Move backport bot to 22.04

nyalldawson · nyalldawson · commit 33d1d2e3c849 · 2023-03-07T09:48:32.000+10:00
diff --git a/.github/workflows/backport.yml b/.github/workflows/backport.yml
@@ -7,7 +7,7 @@ on:
 
 jobs:
   backport:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     name: Backport
     steps:
       - name: Backport Bot
