chore(deps): bump actions/checkout from 6 to 7

Bumps actions/checkout from 6 to 7.

Author: georgidhristov

.github/workflows/build.yml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Setup .NET
         uses: actions/setup-dotnet@v5