Fix exception in Transaction Log after renaming Pholio Mock image: Call to undefined method PholioImageSequenceTransaction::renderHandleLink()
Summary:
Replace call to undefined `renderHandleLink()` with `renderHandle()`.
Additionally, pass `head_key($new)` instead of `key($new)`. This might not be needed strictly speaking for this very issue but should not harm either as several images in a mock can be renamed at once.
```
EXCEPTION: (Error) Call to undefined method PholioImageSequenceTransaction::renderHandleLink() at [<phorge>/src/applications/pholio/xaction/PholioImageSequenceTransaction.php:32]
```
Closes T15680
Test Plan:
* Rename the title of an image in a Pholio mock.
* Go to `/feed/transactions/query/all/` which now renders instead of showing an error, and shows two entries:
* `user renamed an image (newname.jpg) from oldname.jpg to newname.jpg.` and `user updated an image's (newname.jpg) sequence.`
(However, separate T15679 will still show up in the error log after this change.)
Reviewers: O1 Blessed Committers, speck
Reviewed By: O1 Blessed Committers, speck
Subscribers: speck, tobiaswiese, valerio.bozzolan, Matthew, Cigaryno
Maniphest Tasks: T15680
Differential Revision: https://we.phorge.it/D25482