doc: update broken link (#3915)

Author: ahaoboy

docs/installation.md

@@ -54,7 +54,7 @@ Note that for Next.js you must [customize Babel](https://nextjs.org/docs/advance
 
 ## MobX on older JavaScript environments
 
-By default, MobX uses proxies for optimal performance and compatibility. However, on older JavaScript engines `Proxy` is not available (check out [Proxy support](https://kangax.github.io/compat-table/es6/#test-Proxy)). Examples of such are Internet Explorer (before Edge), Node.js < 6, iOS < 10, Android before RN 0.59, or Android on iOS.
+By default, MobX uses proxies for optimal performance and compatibility. However, on older JavaScript engines `Proxy` is not available (check out [Proxy support](https://compat-table.github.io/compat-table/es6/#test-Proxy)). Examples of such are Internet Explorer (before Edge), Node.js < 6, iOS < 10, Android before RN 0.59, or Android on iOS.
 
 In such cases, MobX can fallback to an ES5 compatible implementation which works almost identically, although there are a few [limitations without Proxy support](configuration.md#limitations-without-proxy-support). You will have to explicitly enable the fallback implementation by configuring [`useProxies`](configuration.md#proxy-support):