updated action to ubuntu-22.04

Author: Luke Goodfellow

.github/workflows/main.yml

@@ -2,7 +2,7 @@ name: run codefresh pipeline
 on: push
 jobs:
   build:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@master