[css-transforms-2][meta] Fix linking bug.

Author: tabatkins

css-transforms-2/Overview.bs

@@ -79,7 +79,7 @@ Terminology {#terminology}
 :: An element whose computed value for the 'transform' property includes one of the <a>3D transform functions</a>
 
 : <dfn>3D matrix</dfn>
-:: A 4x4 matrix which does not fulfill the requirements of an <<2D matrix>>.
+:: A 4x4 matrix which does not fulfill the requirements of an [=2D matrix=].
 
 : <dfn>identity transform function</dfn>
 :: In addition to the identity transform function in CSS Transforms, examples for identity transform functions include ''translate3d(0, 0, 0)'', ''translateZ(0)'', ''scaleZ(1)'', ''rotate3d(1, 1, 1, 0)'', ''rotateX(0)'', ''rotateY(0)'', ''rotateZ(0)'' and ''matrix3d(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)''. A special case is perspective: ''perspective(infinity)''. The value of m<sub>34</sub> becomes infinitesimal small and the transform function is therefore assumed to be equal to the identity matrix.