Use latest ubuntu for workflows

Signed-off-by: Jordi Clariana <[email protected]>

Author: jordiclariana

.github/workflows/release-ankorstore.yaml

@@ -23,7 +23,7 @@ on:
 jobs:
   release-ui:
     if: startsWith(github.ref, 'refs/tags/v') == true
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
       - uses: actions/setup-node@v1