message: Change Keshik to Light Cavalry with +25% city attack
diff: <UnitInfo>
  <Class>UNITCLASS_LANCER</Class>
  <Type>UNIT_MONGOLIAN_KESHIK</Type>
  - <Combat>UNITCOMBAT_HEAVY_CAVALRY</Combat>
  + <Combat>UNITCOMBAT_LIGHT_CAVALRY</Combat>
  <Domain>DOMAIN_LAND</Domain>
  <DefaultUnitAI>UNITAI_ATTACK</DefaultUnitAI>
  <Description>TXT_KEY_UNIT_MONGOLIAN_KESHIK</Description>
  <iCollateralDamage>50</iCollateralDamage>
  <iCollateralDamageLimit>60</iCollateralDamageLimit>
  <iCollateralDamageMaxUnits>5</iCollateralDamageMaxUnits>
  + <iCityAttack>25</iCityAttack>
  <iPlainsAttack>25</iPlainsAttack>
  <iPlainsDefense>25</iPlainsDefense>
  <iCultureGarrison>6</iCultureGarrison>
  