Content is now organized by game version and source

This link potentially matches multiple versions of "Riding Horse":

• Riding Horse (System Reference Document 5.2)

  CR 1/4 · Beast (Large)

• Riding Horse (System Reference Document 5.1)

  CR 1/4 · Beast (Large)

• Riding Horse (Monstrous Menagerie)

  CR 1/4 · Beast (Large)