docs: fix dead link in convertTransform.mdx (#2092) (#2106)

Author: LucasLarson

docs/04-plugins/convertTransform.mdx

@@ -16,7 +16,7 @@ svgo:
       description: Number of decimal places to round to, using conventional rounding rules.
       default: 5
     matrixToTransform:
-      description: If decompose matrices into simple transforms. See [Decomposition of 2D-transform matrices](https://frederic-wang.fr/decomposition-of-2d-transform-matrices.html) for more context.
+      description: If to decompose matrices into simple transforms. See [Decomposition of 2D-transform matrices](https://frederic-wang.fr/2013/12/01/decomposition-of-2d-transform-matrices/) for more context.
       default: true
     shortTranslate:
       description: If to shorten references to `translate` with redundant parameters to omit them. i.e. `translate(10 0)` → `translate(10)`