Blizzard adjusted the Base Mana cost of a few spells and recently gave Hammer of the Righteous 2 charges on the Dragonflight Beta.

Paladin

Crusader Strike now costs 10% of Base Mana (was 11%).

Holy

Light of the Martyr now costs 9% of Base Mana (was 7%).

Holy Light now costs 16% of Base Mana (was 15%).

Protection

Hammer of the Righteous now has 2 charges by default.