Bump OpenAPI Generator Version in listener

Author: ajrice6713

.github/workflows/listener.yml

@@ -18,7 +18,7 @@ jobs:
           branch-name: ${{ github.event.client_payload.branchName }}
           username: ${{ secrets.DX_GITHUB_USERNAME }}
           token: ${{ secrets.DX_GITHUB_TOKEN }}
-          openapi-generator-version: v5.4.0
+          openapi-generator-version: 6.0.1
           language: python 
           config: ./openapi-config.yml
         env: