ci: fix output for oss auth (#1592)

Author: everpcpc

.github/workflows/build.yml

@@ -3,8 +3,6 @@ name: build
 on:
   push:
     branches: [main]
-  pull_request:
-    branches: [main]
 
 permissions:
   id-token: write
@@ -43,7 +41,7 @@ jobs:
           region: cn-beijing
           role-session-name: github-actions-${{ github.run_id }}
           oidc-provider-arn: acs:ram::1953761221157405:oidc-provider/github
-          set-outputs: "true"
+          export-environment-variables: "true"
       - name: Sync to OSS
         run: |
           rclone sync ./build/ oss:databend-docs/