Update ci.yml

Changes checkout version from 2 to 3.

Author: ChristianJ-TV

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
 
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       # Print versions
       - name: Powershell Environment