Changed dotnet version

Author: codingben

.github/workflows/unit-tests.yml

@@ -1,7 +1,10 @@
 name: Unit Tests
 
 on:
-  pull_request: { branches: [v2.4] }
+  push:
+    branches: [v2.4]
+  pull_request:
+    branches: [v2.4]
 
 jobs:
   build:
@@ -12,6 +15,6 @@ jobs:
       - name: Setup .NET Core
         uses: actions/setup-dotnet@v1
         with:
-          dotnet-version: 3.1
+          dotnet-version: '3.1.x'
       - name: Execute Tests
         run: dotnet test src/ -c Release