Update docs.yml

Author: dsyme

.github/workflows/docs.yml

@@ -23,7 +23,7 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 5.0.400
+        dotnet-version: 6.0.203
     - name: Restore tools
       run: dotnet tool restore
     - name: Restore projects
@@ -37,7 +37,7 @@ jobs:
     - name: Build FSharp.Formatting master
       run: cd FSharp.Formatting && .\build -t Build
     - name: Run fsdocs
-      run: dotnet FSharp.Formatting\src\fsdocs-tool\bin\Release\net5.0\fsdocs.dll build --sourcefolder fsharp
+      run: dotnet FSharp.Formatting\src\fsdocs-tool\bin\Release\net6.0\fsdocs.dll build --sourcefolder fsharp
     - name: Deploy
       uses: peaceiris/actions-gh-pages@v3
       with: