Update mediawiki/mediawiki-codesniffer requirement from 36.0.0 to 38.0.0#9

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dependabot/composer/mediawiki/mediawiki-codesniffer-38.0.0wbstack/mediawiki-extensions-WikibaseInWikitext:dependabot/composer/mediawiki/mediawiki-codesniffer-38.0.0Copy head branch name to clipboard