Replace the comma before “however” with a semicolon or split into two sentences to avoid a comma splice.

Replace the comma before “however” with a semicolon or split into two sentences to avoid a comma splice.
```suggestion
Thank you for your interest in this GitHub repo; however, right now we are not taking contributions. 
```

_Originally posted by @Copilot in https://github.com/actions/starter-workflows/pull/2900#discussion_r2131971990_
            