chore: Bump setup-dotnet (#2120)

Author: bitsandfoxes

.github/workflows/build.yml

@@ -56,8 +56,7 @@ jobs:
         if: runner.os != 'Windows'
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: |
-            9.0.100
+          global-json-file: src/sentry-dotnet/global.json
 
       - name: Install Android dotnet workflow
         run: dotnet workload install android --temp-dir "${{ runner.temp }}"