Fix typo introduced in 717da86

Didn't realize those were case sensitive. The more you know.

README.md

@@ -24,7 +24,7 @@ There is very little preventing users from using this to mirror pirated content.
 
 * **All commands except** `list` **can have the bot's username appended to them. See** `COMMANDS_USE_BOT_NAME` **under [constants description](#Constants-description).** This is useful if you have multiple instances of this bot in the same group.
 
-* While creating a Telegram bot in the [pre-installation](#pre-installation]) section below, you might want to add the above commands to your new bot by using `/setcommand` in BotFather, make sure all the commands are in lower case. This will cause a list of available bot commands to pop up in chats when you type `/`, and you can long press one of them to select it instead of typing out the entire command.
+* While creating a Telegram bot in the [pre-installation](#Pre-installation]) section below, you might want to add the above commands to your new bot by using `/setcommand` in BotFather, make sure all the commands are in lower case. This will cause a list of available bot commands to pop up in chats when you type `/`, and you can long press one of them to select it instead of typing out the entire command.
 
 ## Migrating from v1.0.0