Update dotnet version on actions

Author: datacute

.github/workflows/ci.yml

@@ -33,7 +33,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: '8.0.x'
+        dotnet-version: '9.0.x'
 
     - name: Restore dependencies
       run: dotnet restore $SOLUTION

.github/workflows/publish.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: '8.0.x'
+        dotnet-version: '9.0.x'
 
     - name: Restore, Build, and Pack
       run: |