Fix duplicate route to setup/leak-canary-plugin

Summary:
Noticed this when building the site. Shame it only warns and doesn't fail the build.
Just fixing it while I'm here.

{F479009268}

Reviewed By: nikoant

Differential Revision: D26911725

fbshipit-source-id: 6440a4b8aee4a6bc053ae771a3b148fd70ffc298

docs/features/leak-canary-plugin.mdx

@@ -4,7 +4,7 @@ title: LeakCanary
 ---
 import useBaseUrl from '@docusaurus/useBaseUrl';
 
-→ [See setup instructions for the LeakCanary](../setup/leak-canary-plugin.mdx)
+→ See setup instructions for [LeakCanary 1](../setup/leak-canary-plugin.mdx) or [LeakCanary 2](../setup/leak-canary-2-plugin.mdx)
 
 The LeakCanary plugin provides developers with Flipper support for [LeakCanary](https://github.com/square/leakcanary), an open source memory leak detection library.
 

docs/setup/leak-canary-2-plugin.mdx

@@ -1,7 +1,7 @@
 ---
-id: leak-canary-plugin
-title: LeakCanary Setup
-sidebar_label: LeakCanary
+id: leak-canary-2-plugin
+title: LeakCanary 2 Setup
+sidebar_label: LeakCanary 2
 ---
 
 Ensure that you already have an explicit dependency in your application's
@@ -46,4 +46,4 @@ import com.facebook.flipper.plugins.leakcanary2.LeakCanary2FlipperPlugin
   }
 ```
 
-That's it!
+That's it!

website/sidebars.js

@@ -88,6 +88,7 @@ module.exports = {
       'setup/sandbox-plugin',
       'setup/shared-preferences-plugin',
       'setup/leak-canary-plugin',
+      'setup/leak-canary-2-plugin',
       'setup/crash-reporter-plugin',
     ],
     Advanced: ['custom-ports', 'stetho'],