No codecov for forked repositroy pull request updates

- Codecoverage was throwing rate limiting errors and thus failing CI.
-https://github.com/ad12/DOSMA/actions/runs/10459944994/job/28965177349#step:7:83
- Therefore, add if statement to no push codecov under these circumstances.

.github/workflows/ci.yml

@@ -110,6 +110,7 @@ jobs:
           make test-cov
       
       - name: Upload to codecov.io
+        if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
         uses: codecov/codecov-action@v1
         with:
           file: ./coverage.xml