fix label name

Author: bearcherian

.github/workflows/copy-documentation-issue.yml

@@ -35,7 +35,7 @@ jobs:
 
       - name: Create an issue in the api-platform repo
         run: |
-          new_issue_url="$(gh issue create --title "$ISSUE_TITLE" --body "$ISSUE_BODY" --repo github/api-platform --label "REST,OpenAPI")"
+          new_issue_url="$(gh issue create --title "$ISSUE_TITLE" --body "$ISSUE_BODY" --repo github/api-platform --label "REST,openapi")"
           echo 'NEW_ISSUE='$new_issue_url >> $GITHUB_ENV
         env:
           GITHUB_TOKEN: ${{secrets.ISSUE_TRANSFER_TOKEN}}