Update prerelease.yml

Author: Joseph Shook

.github/workflows/prerelease.yml

@@ -12,7 +12,9 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 6.0.x
+        dotnet-version: |
+          8.0.x
+          9.0.x
     - name: Set VERSION variable from tag
       run: echo "VERSION=${GITHUB_REF/refs\/tags\/v/}" >> $GITHUB_ENV
     - name: Pack