Bump codecov/codecov-action from 5 to 6 (#3367)

Bumps [codecov/codecov-action](https://github.com/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](codecov/codecov-action@v5...v6)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/build-test.yml

@@ -43,7 +43,7 @@ jobs:
       - name: Build with Maven
         run: mvn clean install -pl -:gremlin-javascript,-:gremlin-dotnet-source,-:gremlin-dotnet-tests,-:gremlin-go,-:gremlin-python -Dci --batch-mode -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn -Dcoverage
       - name: Upload to Codecov
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         with:
          directory: ./gremlin-tools/gremlin-coverage/target/site
   java-jdk8:
@@ -419,7 +419,7 @@ jobs:
           mvn clean install -pl -:gremlin-python,-:gremlin-javascript,-:gremlin-dotnet,-:gremlin-dotnet-source,-:gremlin-dotnet-tests -q -DskipTests -Dci
           mvn verify -pl :gremlin-go
       - name: Upload to Codecov
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         with:
           working-directory: ./gremlin-go
       - name: Go-Vet