Pin the registry at the prod Robinhood metaboard (#2896)

## Summary
- Point the webapp `REGISTRY_URL` and the API `DEFAULT_REGISTRY_URL` at the rain.strategies merge of the prod Robinhood metaboard (`a5fafa4d`, #138).

## Test plan
- [x] Confirm both pins are `https://raw.githubusercontent.com/rainlanguage/rain.strategies/a5fafa4d75aff23ba705dd9e2ba2bb3a472431b3/registry`
- [x] Confirm that registry's settings line includes `metadata-robinhood/prod`

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->

## Summary by CodeRabbit

* **Updates**
  * Updated the registry version used by the app and API.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: Siddharth2207

crates/rest_api/src/config.rs

@@ -1,6 +1,6 @@
 use std::path::PathBuf;
 
-pub const DEFAULT_REGISTRY_URL: &str = "https://raw.githubusercontent.com/rainlanguage/rain.strategies/cb916e1a5bfcc0aead36d183de08b85ddfe21979/registry";
+pub const DEFAULT_REGISTRY_URL: &str = "https://raw.githubusercontent.com/rainlanguage/rain.strategies/a5fafa4d75aff23ba705dd9e2ba2bb3a472431b3/registry";
 
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct Config {

packages/webapp/src/lib/constants.ts

@@ -1,2 +1,2 @@
 export const REGISTRY_URL =
-  "https://raw.githubusercontent.com/rainlanguage/rain.strategies/cb916e1a5bfcc0aead36d183de08b85ddfe21979/registry";
+  "https://raw.githubusercontent.com/rainlanguage/rain.strategies/a5fafa4d75aff23ba705dd9e2ba2bb3a472431b3/registry";