Correct Transaction text when changing Diffusion URI I/O type

Summary:
After changing the I/O type of a Diffusion repository URI, the transaction history incorrectly shows a message which talks about changing the URI's Display type instead.

Closes T15648

Test Plan: Change the I/O type of a Diffusion repo URI and look at that URIs history.

Reviewers: O1 Blessed Committers, avivey

Reviewed By: O1 Blessed Committers, avivey

Subscribers: tobiaswiese, valerio.bozzolan, Matthew, Cigaryno

Maniphest Tasks: T15648

Differential Revision: https://we.phorge.it/D25443