Bump jandelgado/gcov2lcov-action from v1.0.2 to v1.0.8

Bumps [jandelgado/gcov2lcov-action](https://github.com/jandelgado/gcov2lcov-action) from v1.0.2 to v1.0.8.
- [Release notes](https://github.com/jandelgado/gcov2lcov-action/releases)
- [Changelog](https://github.com/jandelgado/gcov2lcov-action/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jandelgado/gcov2lcov-action/compare/v1.0.2...2477d9ec11814a9326e7fdde8d315783d163edb7)

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

.github/workflows/test.yml

@@ -46,7 +46,7 @@ jobs:
         make cover || make cover
 
     - name: Convert coverage to lcov
-      uses: jandelgado/gcov2lcov-action@v1.0.2
+      uses: jandelgado/gcov2lcov-action@v1.0.8
       with:
           infile: cover.out
           outfile: cover.lcov