Fix publish workflow

Author: itssimon

.github/workflows/publish.yaml

@@ -15,7 +15,11 @@ jobs:
           fetch-depth: 0
       - uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: "9.0.x"
+          dotnet-version: |
+            6.0.x
+            7.0.x
+            8.0.x
+            9.0.x
       - name: Set version from tag
         run: echo "VERSION=${GITHUB_REF_NAME#v}" >> $GITHUB_ENV
       - name: Restore dependencies