ci(deps): Bump codecov/codecov-action from 6 to 7 (#698)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 6 to 7.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v6...v7)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-version: '7'
  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/ci.yml

@@ -239,7 +239,7 @@ jobs:
 
     - name: Upload coverage to Codecov
       if: matrix.rust == 'stable' && matrix.os == 'ubuntu-latest' && github.event_name == 'merge_group'
-      uses: codecov/codecov-action@v6
+      uses: codecov/codecov-action@v7
       with:
         file: ./coverage-report/cobertura.xml
         flags: rust
@@ -566,7 +566,7 @@ jobs:
 
     - name: Upload C# coverage to Codecov
       if: matrix.os == 'ubuntu-latest'
-      uses: codecov/codecov-action@v6
+      uses: codecov/codecov-action@v7
       with:
         file: sdks/csharp.tests/TestResults/${{ matrix.os }}/coverage/coverage.cobertura.xml
         flags: dotnet