Actions: Update ubuntu-20.04 (deprecated) -> 22.04

Author: tmewett

.github/workflows/build.yml

@@ -8,7 +8,7 @@ on:
 jobs:
 
   linux:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
     - name: "Install dependencies"
       run: |