syntax: comments before `case` are incorrectly indented

```
$ shfmt --version
v3.3.1
```

Notice `# baz` is indented 2 extra spaces, when it shouldn't be.

### Actual

```sh
case foo in
  # bar
  "$bar") ;;
    # baz
  "$baz") ;;
esac
```

### Expected

```sh
case foo in
  # bar
  "$bar") ;;
  # baz
  "$baz") ;;
esac
```