Update deploy.yml

Author: gjmwolmarans

.github/workflows/deploy.yml

@@ -9,7 +9,7 @@ jobs:
     steps:
 
       - name: Checkout code
-        uses: actions/checkout@4
+        uses: actions/checkout@v4.1.5
       - name: Build and deploy
         run: |
           dotnet publish -c Release -o publish