Check out the code first

This way, we get a `.ruby-version` so that we don't need one when
setting up Ruby.

action.yml

@@ -12,16 +12,16 @@ outputs:
 runs:
   using: "composite"
   steps:
+    - name: Check out code
+      uses: actions/checkout@v4
+
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
 
     - name: Install Bundler Audit
       run: gem install bundler-audit
       shell: bash
 
-    - name: Check out code
-      uses: actions/checkout@v4
-
     - name: Run Bundler Audit
       id: audit
       run: |