[chore] ensure codecov uses token (#5687)

This was done in the collector & collector-contrib repos and makes
tokenless ratelimiting errors go away.

Author: codeboten

.github/workflows/ci.yml

@@ -87,11 +87,12 @@ jobs:
         cp coverage.html $TEST_RESULTS
     - name: Upload coverage report
       uses: codecov/[email protected]
+      env:
+        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
       with:
         file: ./coverage.txt
         fail_ci_if_error: true
         verbose: true
-        token: ${{ secrets.CODECOV_TOKEN }}
     - name: Store coverage test output
       uses: actions/upload-artifact@v4
       with: