fix typo

day10/common.rs

@@ -44,7 +44,7 @@ impl FromStr for Instruction {
         match s {
             "noop" => Ok(Self::Noop),
             _ if { s.starts_with("addx ") } => Ok(Self::Addx {
-                arg: s[5..].parse().map_err(|_| "cannot parse instrution")?,
+                arg: s[5..].parse().map_err(|_| "cannot parse instruction")?,
             }),
             _ => Err("cannot parse instruction"),
         }