Small updates toe create-an-app.mdx

docs/getting-started/create-an-app.mdx

@@ -198,6 +198,8 @@ While `hello` is a simple view-only/read method, `increment` changes on-chain st
 
 The way signing works in a browser is with a _wallet_. Wallets can be web apps, browser extensions, standalone apps, or even separate hardware devices.
 
+### Install Freighter Extension
+
 Right now, the wallet that best supports Soroban is [Freighter](../reference/freighter.mdx). It is available as a Firefox Add-on, as well as extensions for Chrome and Brave. Go ahead and [install it now](https://freighter.app).
 
 Once it's installed, open it up by clicking the extension icon. If this is your first time using Freighter, you will need to create a new wallet. Go through the prompts to create a password and save your recovery passphrase.
@@ -421,7 +423,7 @@ This means that Testnet is down, and you probably just need to wait a while and
 
 ## Wrapping up
 
-Looking at `git diff` will be a great way to remember all the interesting things we did in this step. Some of the things we did:
+Some of the things we did in this section:
 
 - We learned about Astro's no-JS-by-default approach
 - We added Astro components and learned how their `script` and `style` tags work