docs: Fix typo of 'begining' instead of 'beginning' in phpdoc
docs: Fix typo of 'begining' instead of 'beginning' in phpdoc

Change-Id: Ibc015f2133393788634d7e8b6119dcc305c6c534

wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo