Bump codecov/codecov-action from v1.2.2 to v1.3.1

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from v1.2.2 to v1.3.1.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](codecov/codecov-action@v1.2.2...fcebab0)

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

.github/workflows/build.yml

@@ -47,7 +47,7 @@ jobs:
         CGO_ENABLED: 1 
       run: go test -v -race -cover -covermode=atomic -coverprofile=coverage.txt ./...
     - name: Upload coverage report to Codecov
-      uses: codecov/codecov-action@v1.2.2
+      uses: codecov/codecov-action@v1.3.1
       with:
         flags: go${{ matrix.go-version }}
         token: ${{secrets.CODECOV_TOKEN}}