Update actions/checkout from v4.1.1 to v6.0.2 (#81)

Node 20 reaches EOL in April 2026 and GitHub will force Node 24
after June 2, 2026. v6 already uses Node 24 natively.

Author: SeanTAllen

.github/workflows/announce-a-release.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout main
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v6.0.2
         with:
           ref: "main"
           token: ${{ secrets.RELEASE_TOKEN }}
@@ -47,7 +47,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout main
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v6.0.2
         with:
           ref: "main"
           token: ${{ secrets.RELEASE_TOKEN }}

.github/workflows/breakage-against-ponyc-latest.yml

@@ -15,7 +15,7 @@ jobs:
     container:
       image: ghcr.io/ponylang/shared-docker-ci-standard-builder:nightly
     steps:
-      - uses: actions/checkout@v4.1.1
+      - uses: actions/checkout@v6.0.2
       - name: Test
         run: make test config=debug
       - name: Send alert on failure

.github/workflows/generate-documentation.yml

@@ -24,7 +24,7 @@ jobs:
       image: ghcr.io/ponylang/library-documentation-action-v2:release
     steps:
       - name: Checkout
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v6.0.2
       - name: Generate documentation
         run: /entrypoint.py
         env:

.github/workflows/lint-action-workflows.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v6.0.2
       - name: Check workflow files
         uses: docker://ghcr.io/ponylang/shared-docker-ci-actionlint:20260311
         with:

.github/workflows/pony-lint.yml

@@ -19,6 +19,6 @@ jobs:
     container:
       image: ghcr.io/ponylang/shared-docker-ci-standard-builder:release
     steps:
-      - uses: actions/checkout@v4.1.1
+      - uses: actions/checkout@v6.0.2
       - name: Lint
         run: pony-lint

.github/workflows/pr-repo-hygiene.yml

@@ -14,7 +14,7 @@ jobs:
     name: Lint bash, docker, markdown, and yaml
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4.1.1
+      - uses: actions/checkout@v6.0.2
       - name: Lint codebase
         uses: docker://github/super-linter:v3.8.3
         env:
@@ -29,7 +29,7 @@ jobs:
     name: Verify CHANGELOG is valid
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4.1.1
+      - uses: actions/checkout@v6.0.2
       - name: Verify CHANGELOG
         uses: docker://ghcr.io/ponylang/changelog-tool:release
         with:

.github/workflows/pr.yml

@@ -23,15 +23,15 @@ jobs:
     container:
       image: ghcr.io/ponylang/shared-docker-ci-standard-builder:release
     steps:
-      - uses: actions/checkout@v4.1.1
+      - uses: actions/checkout@v6.0.2
       - name: Test
         run: make test config=debug
 
   vs-ponyc-release-macOS-x86_64:
     name: Test against recent ponyc release on x86-64 macOS
     runs-on: macos-26
     steps:
-      - uses: actions/checkout@v4.1.1
+      - uses: actions/checkout@v6.0.2
       - name: Install dependencies
         run: bash .ci-scripts/macOS-install-pony-tools.bash release
       - name: Test
@@ -43,7 +43,7 @@ jobs:
     name: Test against recent ponyc release on Windows
     runs-on: windows-2025
     steps:
-      - uses: actions/checkout@v4.1.1
+      - uses: actions/checkout@v6.0.2
       - name: Test with most recent ponyc release
         run: |
           Invoke-WebRequest https://dl.cloudsmith.io/public/ponylang/releases/raw/versions/latest/ponyc-x86-64-pc-windows-msvc.zip -OutFile C:\ponyc.zip;

.github/workflows/prepare-for-a-release.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout main
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v6.0.2
         with:
           ref: "main"
           token: ${{ secrets.RELEASE_TOKEN }}
@@ -63,7 +63,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout main
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v6.0.2
         with:
           ref: "main"
           token: ${{ secrets.RELEASE_TOKEN }}
@@ -88,7 +88,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout main
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v6.0.2
         with:
           ref: "main"
           token: ${{ secrets.RELEASE_TOKEN }}

.github/workflows/release.yml

@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout main
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v6.0.2
         with:
           ref: "main"
           token: ${{ secrets.RELEASE_TOKEN }}
@@ -43,7 +43,7 @@ jobs:
       image: ghcr.io/ponylang/library-documentation-action-v2:release
     steps:
       - name: Checkout
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v6.0.2
         with:
           ref: "main"
           token: ${{ secrets.RELEASE_TOKEN }}
@@ -69,7 +69,7 @@ jobs:
     needs:
       - generate-documentation
     steps:
-      - uses: actions/checkout@v4.1.1
+      - uses: actions/checkout@v6.0.2
         with:
           ref: "main"
           token: ${{ secrets.RELEASE_TOKEN }}