Missing code block error now uses code blocks itself (#19)

The missing code block error now uses code blocks to nicely format the
error message:

## Old output
![Old
output](https://github.com/rust-community-discord/ferrisbot-for-discord/assets/23159282/e08cb1b4-4f86-4a32-ac99-6b4e27381380)

## New output
![New
output](https://github.com/rust-community-discord/ferrisbot-for-discord/assets/23159282/58c166a3-2c82-4777-9d78-2c9cf81a136c)

Co-authored-by: Ivan Borgia Dardi <[email protected]>

src/main.rs

@@ -105,11 +105,13 @@ async fn serenity(#[shuttle_runtime::Secrets] secret_store: SecretStore) -> Shut
 						let response = if error.is::<poise::CodeBlockError>() {
 							"\
 Missing code block. Please use the following markdown:
-\\`code here\\`
+`` `code here` ``
 or
-\\`\\`\\`rust
+```ansi
+`\x1b[0m`\x1b[0m`rust
 code here
-\\`\\`\\`"
+`\x1b[0m`\x1b[0m`
+```"
 								.to_owned()
 						} else if let Some(multiline_help) = &ctx.command().help_text {
 							format!("**{}**\n{}", error, multiline_help)