Updated mediawiki/extensions
Project: mediawiki/extensions/Math  48b029fbe9fbf94ae5c6dbdb81fa7c2fe3c0f737

Fix MathRenderer::renderMath.

The call to getRenderer is supposed to be a static method in the same class,
not a global function.

Change-Id: I5d101574b1d67238c6357e154209f2595cb36859