chore: enable publish_csharp (PR#7)

Author: 2ynn

.github/workflows/sdk_publish.yaml

@@ -10,6 +10,8 @@ on:
 jobs:
   publish:
     uses: speakeasy-api/sdk-generation-action/.github/workflows/sdk-publish.yaml@v15
+    with:
+      publish_csharp: true
     secrets:
       github_access_token: ${{ secrets.GITHUB_TOKEN }}
       speakeasy_api_key: ${{ secrets.SPEAKEASY_API_KEY }}