Updated Github Actions runner image to ubuntu-22.04.

Author: jlesage

.github/workflows/build-image.yml

@@ -19,7 +19,7 @@ on:
 jobs:
   build:
     name: Build image
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
       - name: Free disk space
@@ -148,7 +148,7 @@ jobs:
   notification:
     name: Notification
     needs: [ build ]
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     if: ${{ always() && github.event_name != 'pull_request' }}
 
     steps: