Bump codecov/codecov-action

Bumps the gh-dependency group in /.github/workflows with 1 update: [codecov/codecov-action](https://github.com/codecov/codecov-action).


Updates `codecov/codecov-action` from 5 to 6
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](https://github.com/codecov/codecov-action/compare/v5...v6)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: gh-dependency
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/build.yaml

@@ -43,7 +43,7 @@ jobs:
           make test
 
       - name: Upload coverage
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         with:
           token: ${{ secrets.CODECOV }}
           files: ./coverage/*.out

.github/workflows/tests.yaml

@@ -196,7 +196,7 @@ jobs:
           go test --race -v -count=1 -coverprofile=coverage/alarms.out ./alarms/...
 
       - name: Upload coverage
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         with:
           token: ${{ secrets.CODECOV }}
           files: ./coverage/*.out