Upgrade codecov-action from deprecated v1 to v3 (#1129)

Signed-off-by: Pavel Macík <[email protected]>

Author: pmacik

.github/workflows/pr-checks.yaml

@@ -56,7 +56,7 @@ jobs:
           make test
 
       - name: Upload Code Coverage Report
-        uses: codecov/codecov-action@v1
+        uses: codecov/codecov-action@v3
         with:
           file: cover.out
           verbose: true