Update Kid3.app to v3.1.1

```sh
$ cask install kid3
==> Downloading https://downloads.sourceforge.net/sourceforge/kid3/kid3-3.1.1-Darwin.dmg
######################################################################## 100.0%
==> Note: running "brew update" may fix checksum errors
Error: SHA2 mismatch
Expected: 1a27b9743a4029221601fb872a38aca235a23f8234c7a07fa0cb547eb58129c6
Actual: 39797bc138c2a4c922bab9afda22b0d901038ad672455b08f88c09a459c39983
Archive: /Library/Caches/Homebrew/kid3-3.1.1.dmg
To retry an incomplete download, remove the file above.

$ cat /Library/Caches/Homebrew/kid3-3.1.1.dmg
<!doctype html>
<!-- Server: sfs-consume-20 -->

<!--[if lt IE 7 ]> <html lang="en" class="no-js ie6"> <![endif]-->
<!--[if IE 7 ]>    <html lang="en" class="no-js ie7"> <![endif]-->
<!--[if IE 8 ]>    <html lang="en" class="no-js ie8"> <![endif]-->
<!--[if IE 9 ]>    <html lang="en" class="no-js ie9"> <![endif]-->
...
```