Try to define the .NET Version.

Author: SebastianStehle

.github/workflows/deploy.yml

@@ -15,11 +15,15 @@ jobs:
     steps:
     - uses: actions/checkout@v4.2.2
 
-    - name: setup dotnet
+    - name: dotnet
       uses: actions/setup-dotnet@v4.3.1
       with:
         dotnet-version: 8.0.x
 
+    - name: Create `global.json`
+      run: |
+        echo '{"sdk":{"version": "${{ steps.dotnet.outputs.dotnet-version }}"}}' > ./global.json
+
     - name: test
       timeout-minutes: 10
       run: |