chore: record the GroovyMAME part of Other

Filing device sets under each of their systems gave the Other page a
GroovyMAME part of its own, recorded so its address keeps a target.

website/src/data/published-parts.json

@@ -291,6 +291,7 @@
  "systems/other-fbneo.md": "systems/other.md",
  "systems/other-future-pinball-fploader.md": "systems/other.md",
  "systems/other-gopher2600.md": "systems/other.md",
+ "systems/other-groovymame.md": "systems/other.md",
  "systems/other-idtech4a.md": "systems/other.md",
  "systems/other-ines.md": "systems/other.md",
  "systems/other-mame-2.md": "systems/other.md",