Make the heading "token extensions" too

Co-authored-by: Mike MacCana <mike.maccana@gmail.com>

Author: mikemaccana

apps/docs/content/docs/en/programs/examples.mdx

@@ -20,7 +20,7 @@ example programs within them:
 
 - [Basics](#basics)
 - [Tokens](#tokens)
-- [Token Extensions (Token 2022)](#token-2022-token-extensions)
+- [Token Extensions (Token 2022)](#token-extensions-token-2022)
 
 There are also [ecosystem program examples](#ecosystem-solana-program-examples)
 
@@ -63,7 +63,7 @@ interact with them in programs.
 | [Transfer Tokens](https://github.com/solana-developers/program-examples/tree/main/tokens/transfer-tokens)       | Shows how to transfer SPL token using CPIs into the token program.                                 | Anchor, Native |
 | [Token-2022](https://github.com/solana-developers/program-examples/tree/main/tokens/token-2022)                 | See Token 2022 (Token extensions).                                                                 | Anchor, Native |
 
-## Token 2022 (Token Extensions)
+## Token Extensions (Token 2022)
 
 Token 2022 is a new standard for tokens on Solana. It is a more flexible and
 lets you add 16 different extensions to a token mint to add more functionality