fix

Author: josefpihrt

.github/workflows/build.yml

@@ -28,8 +28,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Setup .NET 9 SDK
-        uses: actions/setup-dotnet@v4
+      - uses: actions/setup-dotnet@v4
         with:
           dotnet-version: |
             8.0.x
@@ -87,6 +86,11 @@ jobs:
         working-directory: src
     steps:
       - uses: actions/checkout@v4
+      - uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: |
+            8.0.x
+            9.0.x
       - run: dotnet restore Roslynator.CoreAndTesting.slnf
       - run: dotnet build Roslynator.CoreAndTesting.slnf --no-restore
       - run: dotnet pack Roslynator.CoreAndTesting.slnf --no-build -o _nupkg