[PR] Fix typo in documentation
[PR] Fix typo in documentation

Summary:
/en/docs/types/
Closes https://github.com/facebook/flow/pull/5747

Differential Revision: D7423880

Pulled By: mroch

fbshipit-source-id: 31c2c0fc4f83fce6a5a100f35a1cdd362721152e

nmote/flow,jamesgpearce/flow,jamesgpearce/flow,mroch/flow,jamesgpearce/flow,JonathanUsername/flow,gabelevi/flow,AgentME/flow,gabelevi/flow,popham/flow,jamesgpearce/flow,claudiopro/flow,popham/flow,nmote/flow,facebook/flow,gabelevi/flow,samwgoldman/flow,popham/flow,mroch/flow,facebook/flow,jamesgpearce/flow,claudiopro/flow,JonathanUsername/flow,samwgoldman/flow,facebook/flow,popham/flow,facebook/flow,samwgoldman/flow,mroch/flow,samwgoldman/flow,jamesgpearce/flow,JonathanUsername/flow,jamesgpearce/flow,AgentME/flow,mroch/flow,nmote/flow,samwgoldman/flow,claudiopro/flow,JonathanUsername/flow,AgentME/flow,gabelevi/flow,facebook/flow,claudiopro/flow,nmote/flow,mroch/flow,gabelevi/flow,JonathanUsername/flow,samwgoldman/flow,JonathanUsername/flow,mroch/flow,popham/flow,facebook/flow,nmote/flow,nmote/flow,facebook/flow,gabelevi/flow,popham/flow,JonathanUsername/flow,mroch/flow,AgentME/flow,claudiopro/flow,AgentME/flow,nmote/flow,samwgoldman/flow,gabelevi/flow,popham/flow