Update getStakeActivation.mdx (#351)

* Update getStakeActivation.mdx

* Add redirect for getstakeactivation

* Fix redirect

Author: Woody4618

docs/rpc/deprecated/getStakeActivation.mdx

@@ -3,15 +3,15 @@ sidebarLabel: getStakeActivation
 title: getStakeActivation RPC Method
 hideTableOfContents: true
 altRoutes:
-  - /docs/rpc/getStakeActivation
+  - /docs/rpc/http/getStakeActivation
 ---
 
 Returns epoch activation information for a stake account
 
 <Callout type={"warning"} title={"Deprecated Method"}>
   This method is expected to be removed in `solana-core` v2.0. Please use [this
   alternative
-  approach](https://gist.github.com/joncinque/ccd5166a857d629f30b2c01cd010041d)
+  approach](https://github.com/solana-developers/solana-rpc-get-stake-activation)
   instead.
 </Callout>