Upload coverage report to Codacy only when on Ubuntu

codacy/codacy-coverage-reporter-action is not supported on Windows:
> Error: Container action is only supported on Linux

Author: 0xced

.github/workflows/continuous-integration.yml

@@ -38,6 +38,7 @@ jobs:
         id: dotnet-test
       - name: Upload coverage report to Codacy
         uses: codacy/codacy-coverage-reporter-action@master
+        if: matrix.os == 'ubuntu-latest'
         with:
           project-token: ${{ secrets.CODACY_PROJECT_TOKEN }}
           coverage-reports: ${{ steps.dotnet-test.outputs.coverlet-reports }}