Add SDK8 and 6 to CI bootstrap, release-notes tool needs it (part 2) (#89)

Author: Mpdreamz

.github/workflows/ci.yml

@@ -67,7 +67,10 @@ jobs:
       uses: actions/setup-dotnet@v4
       with:
         global-json-file: ./global.json
-        
+        dotnet-version: |
+            6.x
+            8.x
+
     - name: Build
       run: ./build.sh build -s true
 
@@ -135,6 +138,14 @@ jobs:
       with:
         fetch-depth: 1
 
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v4
+      with:
+          global-json-file: ./global.json
+          dotnet-version: |
+              6.x
+              8.x
+
     - uses: actions/download-artifact@v4
       with:
         name: build