add dual SDK for matrix build

Author: DaveSkender

.github/workflows/test-indicators-matrix.yml

@@ -38,7 +38,9 @@ jobs:
       - name: Setup .NET SDK
         uses: actions/setup-dotnet@v5
         with:
-          dotnet-version: ${{ matrix.dotnet-version }}
+          dotnet-version: |
+            ${{ matrix.dotnet-version }}
+            10.0.x
           dotnet-quality: "ga"
           cache: true
           cache-dependency-path: "**/packages.lock.json"