thisisnic opened a new pull request, #47247: URL: https://github.com/apache/arrow/pull/47247
### Rationale for this change Add previous version of R package to backward compatibility job so we can ensure we don't make breaking changes ### What changes are included in this PR? Add 21.0.0 to CI job ### Are these changes tested? No ### Are there any user-facing changes? No -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: github-unsubscr...@arrow.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
