Update release.yml (#155)

Author: dallasread

.github/workflows/release.yml

@@ -9,6 +9,10 @@ jobs:
   publish:
     name: Publish Client
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        dotnet-version:
+          - '9.0.x'
     steps:
       - name: Wait for tests to succeed
         uses: lewagon/wait-on-check-action@v1.3.4
@@ -19,6 +23,10 @@ jobs:
           wait-interval: 10
           allowed-conclusions: success
       - uses: actions/checkout@v4
+      - name: Setup dotnet ${{ matrix.dotnet-version }}
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: ${{ matrix.dotnet-version }}
       - name: Set VERSION variable from tag
         run: echo "VERSION=${GITHUB_REF/refs\/tags\/v/}" >> $GITHUB_ENV
       - name: Pack