Fix outdated Link

The old link returns a Github Pages 404 error.

Author: scurker

docs/rules/jsx-uses-vars.md

@@ -1,6 +1,6 @@
 # Prevent variables used in JSX to be incorrectly marked as unused (jsx-uses-vars)
 
-Since 0.17.0 the ESLint `no-unused-vars` rule does not detect variables used in JSX ([see details](http://eslint.org/blog/2015/03/eslint-0.17.0-released/#changes-to-jsx/react-handling)). This rule will find variables used in JSX and mark them as used.
+Since 0.17.0 the ESLint `no-unused-vars` rule does not detect variables used in JSX ([see details](http://eslint.org/blog/2015/03/eslint-0.17.0-released#changes-to-jsxreact-handling)). This rule will find variables used in JSX and mark them as used.
 
 This rule only has an effect when the `no-unused-vars` rule is enabled.