Update dotnet.yml

Author: seeste

.github/workflows/dotnet.yml

@@ -17,7 +17,7 @@ jobs:
     - name: Install-Office365Suite
       run:  Install-Script -Name Install-Office365Suite -force
     - name: setup office
-      run: .\Install-Office365Suite.ps1
+      run:  Install-Office365Suite.ps1
     - uses: actions/checkout@v2
     - name: Setup .NET
       uses: actions/setup-dotnet@v1