Log Message:
devel/ruby-octokit: update to 4.21.0

4.21.0 (2021-04-26)

API Support

* #1319 Add delete workflow run support @szemek
* #1322 Add match refs support @AHaymond
* #1329 Add rename branch support @gmcgibbon
* #1332 Add billing actions support @M-Yamashita01

Error handling

* #1324 Handle path diff too large errors @yykamei

Code clean up

* #1326 Remove graduated preview headers @ivailop

Documentation

* #1314 Update authentication usage @curquiza
* #1317 Fix logo link @gjtorikian
* #1318 Fix GitHub typo @bl-ue