Fix channal typo (#2355)

Fixes #2321

Author: kangalio

examples/e05_command_framework/src/main.rs

@@ -354,7 +354,7 @@ async fn say(ctx: &Context, msg: &Message, mut args: Args) -> CommandResult {
             let settings = if let Some(guild_id) = msg.guild_id {
                 // By default roles, users, and channel mentions are cleaned.
                 ContentSafeOptions::default()
-                    // We do not want to clean channal mentions as they
+                    // We do not want to clean channel mentions as they
                     // do not ping users.
                     .clean_channel(false)
                     // If it's a guild channel, we want mentioned users to be displayed