Update src/profiles/faqs.md

Author: stayseesong

src/profiles/faqs.md

@@ -49,4 +49,4 @@ If two merged user profiles contain conflicting profile attributes, Segment sele
 Any of the external IDs can be used to query a profile. When a profile is requested, Segment traverses the merge graph and resolves all merged profiles. The result is a single profile, with the latest state of all traits, events, and identifiers.
 
 ### Can ExternalID's be changed or removed from the profiles?
-No. Because ExternalID's are used by the Identity Graph, they remain for the lifetime of the user profile.
+No. As the Identity Graph uses ExternalIDs, they remain for the lifetime of the user profile.