Updating github actions branch name

Author: CoreyKaylor

.github/workflows/dotnet-test.yml

@@ -2,9 +2,9 @@ name: .NET Tests
 
 on:
   push:
-    branches: [ master ]
+    branches: [ main ]
   pull_request:
-    branches: [ master ]
+    branches: [ main ]
 
 jobs:
   build:
@@ -30,4 +30,4 @@ jobs:
         run: dotnet build --no-restore
       - name: Test
         working-directory: ${{ runner.workspace }}/Lightning.NET
-        run: dotnet test --no-build --no-restore --verbosity normal
+        run: dotnet test --no-build --no-restore --verbosity normal