Fixing typo in apihelp-echopushsubscriptions+delete-example: Unegister → Unregister
Fixing typo in apihelp-echopushsubscriptions+delete-example:
Unegister → Unregister

Please mark it as not requiring translations update.

Change-Id: Ib096a89818f3e0f7b76a8a884e0b35ecceb3d353

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