Bump the runner image to the newer Ubuntu.

Author: sadiepowell

.github/workflows/build-container.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     env:
       ANOPE_VERSION: 2.0.17
       DOCKER_REPO: anope/anope