fix dotnet version for workflow

Author: RohitM-IN

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
 
     strategy:
       matrix:
-        dotnet-version: [7.0, 8.0]
+        dotnet-version: ['7.0', '8.0']
 
     steps:
     - name: Checkout Main Repository