[ISSUE #922] [Enhancement] Update GitHub workflows for C# client (#923)

Co-authored-by: tsaitsung-han.tht <tsaitsung-han.tht@alibaba-inc.com>
diff --git a/.github/workflows/csharp_build.yml b/.github/workflows/csharp_build.yml
index 13a4db0..590ba7b 100644
--- a/.github/workflows/csharp_build.yml
+++ b/.github/workflows/csharp_build.yml
@@ -8,7 +8,7 @@
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-20.04, macos-12, windows-2022]
+        os: [ubuntu-20.04, macos-latest, windows-2022]
     steps:
       - name: Checkout
         uses: actions/checkout@v3