That movie has come under fire in recent years for its depiction of a transgender character. Finkle Einhorn was originally created as a reference to the movie Ace Ventura: Pet Detective. Notably, the game has changed the name of the character 'Finkle Einhorn' to Pip Quickwit. Outside of these changes to the game's orcs, several other changes have been made. It's worth noting that a character by the name of 'Captain Greenskin' has not had their name changed. While several 'greenskin' references have been dropped or altered, similar terms such as 'green hide' remain in the game.
However, as the website Wowhead points out, it's also possible this was an attempt by World of Warcraft to distance itself from similar terms in Warhammer.
Given that this argument has been made several times in the past ( including by 's Christian Hoffer), it's possible the changes were made in an effort to make the game more welcoming.