config: Add ar.com.pilas_engine.App to es images

[dylanmccall]

This game making application is currently only useful in Spanish, so we will add it to the "es" personality.

https://phabricator.endlessm.com/T34960

[dylanmccall]

For reference…

$ flatpak info ar.com.pilas_engine.App

Pilas Engine - Pilas Engine es una herramienta para construir videojuegos de
manera sencilla y divertida

          ID: ar.com.pilas_engine.App
         Ref: app/ar.com.pilas_engine.App/x86_64/stable
        Arch: x86_64
      Branch: stable
     Version: 2.7.3
     License: GPL-3.0-only
      Origin: flathub
  Collection: org.flathub.Stable
Installation: system
   Installed: 244.5 MB
     Runtime: org.freedesktop.Platform/x86_64/21.08
         Sdk: org.freedesktop.Sdk/x86_64/21.08

      Commit: b188ee578e20287dbb4546ebc0f5f63e37fd410f60272809cddd11b9d6797cf7
      Parent: 4d4a792de8bcb2e288c01026fa83b9c6bc2f81fa630010818f5dfde55fbfa3c7
     Subject: Remove unused files from git revisioning (4a0b2ce4)
        Date: 2021-12-21 20:39:59 +0000

I sent a pull request (hi @manuq!) updating this all to the newest versions: flathub/ar.com.pilas_engine.App#2.

Looks like we'll also need to update the es_* personality configurations in endless-image-config, right?