Update main.yml

Author: Dynamsoft-Henry

.github/workflows/main.yml

@@ -32,7 +32,7 @@ jobs:
       doc-url: capture-vision/docs/mobile
     secrets: inherit
 
-  Build-Preview:
+  Build-v2:
     if: ${{ github.ref == 'refs/heads/v2' }}
     uses: dynamsoft-docs/Docs-Template-Repo/.github/workflows/called-workflow-build-sync-testing.yml@DCV-v2
     with: