Updated mediawiki/extensions
Project: mediawiki/extensions/OAuth  0375a9a24c466727b245af72c11e81b1129507c7

Improve instructions for developers

Add more instructions for developer forms, and make it obvious those
pages are for developers only.

Bug: 53967

Change-Id: I46e38e941e88c24e0f8ae4692db3b9b58f20a9c2