fix: rename DevelopersKnowledge to DeveloperKnowledge#9222

bshaffer wants to merge 4 commits into

owl-bot-copy-DevelopersKnowledgegoogleapis/google-cloud-php:owl-bot-copy-DevelopersKnowledgefrom

rename-developerknowledgegoogleapis/google-cloud-php:rename-developerknowledgeCopy head branch name to clipboard