workflow assigner update runs on ubuntu to 22.04

Author: ryanhagen-tmo

.github/workflows/assigner.yml

@@ -15,7 +15,7 @@ jobs:
   assignment:
     name: Pull Request Assignment
     if: github.event.pull_request.draft == false
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
     - name: Install Python dependencies