upd codecov actions

Author: vmikk

.github/workflows/go-cov.yml

@@ -28,8 +28,8 @@ jobs:
       run: go test -v -run TestAll -coverprofile=coverage.out -covermode=atomic
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v4
+      uses: codecov/codecov-action@v5
       with:
-        file: ./coverage.out
+        files: ./coverage.out
         flags: unittests
         token: ${{ secrets.CODECOV_TOKEN }}