fix: rune manipulator typo

19-strings-runes-bytes/exercises/03-rune-manipulator/solution/main.go

@@ -58,7 +58,7 @@ func main() {
 		// Print the last rune of the strings
 		// Hint: Use utf8.DecodeLastRuneInString
 		r, size = utf8.DecodeLastRuneInString(s)
-		fmt.Printf("\tfirst   : %q (%d bytes)\n", r, size)
+		fmt.Printf("\tlast    : %q (%d bytes)\n", r, size)
 
 		// Slice and print the first two runes of the strings
 		_, first := utf8.DecodeRuneInString(s)