Revert 'Code goes here on a new line' to 'Hello world!'

bot/resources/tags/codeblock.md

@@ -5,7 +5,7 @@ embed:
 Here's how to format Python code on Discord:
 
 \`\`\`py
-print('Code goes here on a new line')
+print('Hello world!')
 \`\`\`
 
 **These are backticks, not quotes.** Check [this](https://superuser.com/questions/254076/how-do-i-type-the-tick-and-backtick-characters-on-windows/254077#254077) out if you can't find the backtick key.