[iOS] Bump NotificationService CFBundleVersion to match parent app

Summary:
Was noticing this warning at the end of iOS builds:

warning: The CFBundleVersion of an app extension ('1') must match that of its containing parent app ('141').

This change gets rid of the warning.

Does it make a difference? Probably not.

Test Plan: Did command-line build and made sure that warning didn't appear at the end of the logs.

Reviewers: marcin, abosh, tomek, jacek, varun, ashoat

Reviewed By: abosh, ashoat

Subscribers: ashoat, adrian

Differential Revision: https://phab.comm.dev/D4831