Fix typo Debian README

[mrcnkwcz]

Minor typo corrections in Debian README.md

[andylshort]

Change looks good, you just need to sign the CLA and we can get this merged.

[mrcnkwcz]

I signed the CLA and tested it using the API.
Think it should work fine. Let me know if that's not the case, thanks.

https://cla.canonical.com/cla/check?github_usernames=mrcnkwcz
{
  "emails": {

  },
  "github_usernames": {
    "mrcnkwcz": true
  },
  "launchpad_usernames": {

  }
}

[alexsander-souza]

could you please rebase your branch?