docs: change setApprovalPrompt to setPrompt in oauth-web.md (#1822)
docs: change setApprovalPrompt to setPrompt in oauth-web.md (#1822)


bshaffer/google-api-php-client,michabbb-backup/google-api-php-client,googleapis/google-api-php-client,eRadical/google-api-php-client,michabbb-backup/google-api-php-client