Fix URLs to new plugins in v0.5.3 notes

CHANGELOG.md

@@ -4,7 +4,7 @@
 * Fixed a bug with quoted reference in `url()`.
 * Now, if there are several same IDs in the document, then the first one is used and others are being removed.
 * New command-line option `--show-plugins` displaying list of plugins.
-* Two new optional plugins: “[removeDimensions](removeDimensions.js)” (removes `width` and `height` if there is `viewBox`) and “[removeAttrsPlugin](removeAttrsPlugin.js)” (by @bennyschudel).
+* Two new optional plugins: “[removeDimensions](https://github.com/svg/svgo/blob/master/plugins/removeDimensions.js)” (removes `width` and `height` if there is `viewBox`) and “[removeAttrsPlugin](https://github.com/svg/svgo/blob/master/plugins/removeAttrs.js)” (by @bennyschudel).
 
 ### [ [>](https://github.com/svg/svgo/tree/v0.5.2) ] 0.5.2 / 24.05.2015
 * Introduced new `transformPrecision` option for better image quality (defaults to 5) in “[convertTransform](https://github.com/svg/svgo/blob/master/plugins/convertTransform.js)” and “[convertPathData](https://github.com/svg/svgo/blob/master/plugins/convertPathData.js)” (for the purpose of applying transformations) plugins.