Use ubuntu-latest

Author: OskarStark

.github/workflows/update_version.yml

@@ -61,8 +61,8 @@ jobs:
 
     publish_docker_images:
         needs: [update-version]
-        runs-on: ubuntu-20.04
-       
+        runs-on: ubuntu-latest
+
         if: github.ref == 'refs/heads/master' || github.event_name == 'release'
         steps:
         - name: Checkout
@@ -71,7 +71,7 @@ jobs:
           id: meta
           uses: crazy-max/ghaction-docker-meta@v2
           with:
-              images: oskarstark/phpstan-ga 
+              images: oskarstark/phpstan-ga
               tags: |
                   type=raw,value=latest,enable=${{ endsWith(github.ref, 'master') }}
                   type=ref,event=tag