Bump to Ubuntu 22.04

Author: aswaterman

.github/workflows/continuous-integration.yml

@@ -18,7 +18,7 @@ on:
 jobs:
   test:
     name: Test Spike build (Ubuntu)
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v2
         with:

.github/workflows/debug-smoke.yml

@@ -13,7 +13,7 @@ on:
 jobs:
   test:
     name: Test debug (Ubuntu)
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v2