chore(ci): fix typo in code owners file (#15594)

## Description

Per title

## Testing

<!-- Describe your testing strategy or note what tests are included -->

## Risks

<!-- Note any risks associated with this change, or "None" if no risks
-->

## Additional Notes

<!-- Any other information that would be helpful for reviewers -->

Author: cbeauchesne

.github/CODEOWNERS

@@ -83,7 +83,7 @@ ddtrace/internal/ci_visibility                        @DataDog/ci-app-libraries
 ddtrace/internal/test_visibility                      @DataDog/ci-app-libraries
 ddtrace/internal/codeowners.py                        @DataDog/apm-core-python @DataDog/ci-app-libraries
 ddtrace/internal/coverage                             @DataDog/apm-core-python @DataDog/ci-app-libraries
-tests/internal/test_codeowners.py                     @datadog/ci-app-libraries
+tests/internal/test_codeowners.py                     @DataDog/ci-app-libraries
 tests/ci_visibility                                   @DataDog/ci-app-libraries
 tests/coverage                                        @DataDog/apm-core-python @DataDog/ci-app-libraries
 tests/tracer/test_ci.py                               @DataDog/ci-app-libraries