docs: Fix broken link (#501)

docs/source/index.mdx

@@ -16,7 +16,7 @@ Apollo iOS executes queries and mutations using a GraphQL server and returns res
 Apollo iOS also includes caching mechanisms specifically for GraphQL data, enabling you to execute GraphQL queries against your locally cached data directly.
 
 <div>
-  <ButtonLink href="./get-started/" size="lg">
+  <ButtonLink href="./get-started" size="lg">
     Installation
   </ButtonLink>
 </div>
@@ -74,7 +74,7 @@ Apollo iOS handles all the heavy lifting of networking with GraphQL, including:
 Apollo Client's integration for [React](/react) also works with [React Native](https://facebook.github.io/react-native/) on both iOS and Android.
 
 <div align="center">
-  <ButtonLink href="./get-started/" size="lg">
+  <ButtonLink href="./get-started" size="lg">
     Get Started!
   </ButtonLink>
 </div>