CI updates

.github/workflows/wgit.yaml

@@ -2,15 +2,19 @@ name: wgit
 on: [push]
 jobs:
   wgit-ci:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     services:
       mongodb:
         image: michaeltelford/mongo-wgit
         ports:
           - 27017:27017
     steps:
-      - name: bundle
-        run: bundle install
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          # ruby-version: '3.3' # Not needed with a .ruby-version file
+          bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+
       - name: ci
         run: bundle exec toys ci
       - name: docs