Update README.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: JacobCoffee

README.md

@@ -29,7 +29,7 @@ Fork the repo, create a branch, and open a pull request. Before submitting:
 - Write tests for any new or changed code
 - Check for missing migrations with `make migrations`
 
-CI runs on every PR — it checks for ungenerated migrations and enforces 75%
+CI runs on every PR — it checks for ungenerated migrations and enforces a 75%
 test coverage minimum. PRs that fail CI won't be merged.
 
 See the full [contributing guide](https://pythondotorg.readthedocs.io/en/latest/contributing.html) for details.