chore(deps): bump checkout due to node16 deprecation (#27)

Fixes the following:

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/

Author: csett86

action.yml

@@ -29,7 +29,7 @@ runs:
   using: "composite"
   steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         submodules: "true"