Fix "TypeError: typeahead.updatePlaceHolder is not a function" in global search
Summary:
Misspelled JS function names create JS error output.
Closes T16140
Test Plan: Open browser console, enter a search term into the global search field in the upper right corner, press Enter key.
Reviewers: O1 Blessed Committers, mainframe98
Reviewed By: O1 Blessed Committers, mainframe98
Subscribers: tobiaswiese, valerio.bozzolan, Matthew, Cigaryno
Maniphest Tasks: T16140
Differential Revision: https://we.phorge.it/D26125