Update checkout action to v5

Close PR #99.

Author: molsonkiko

.github/workflows/CI_build.yml

@@ -22,7 +22,7 @@ jobs:
 
     steps:
     - name: Checkout repo
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Add msbuild to PATH
       uses: microsoft/setup-msbuild@v2.0.0