Upgrade .NET setup action to version 5

Author: KyleMcMaster

.github/workflows/build-ramdisk.yml

@@ -17,7 +17,7 @@ jobs:
 
       # Step 2: Set up .NET environment
       - name: Setup .NET
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v5
         with:
           dotnet-version: 10.0.x