Log Message:
shells/sheldon: update to 0.7.4

0.7.4 November 19th, 2023
 - Support optional access in templates. This allows you to use the .? operator
   in templates to optionally access a field in templates, for example
   {{ hooks?.pre }} will return None and not error if pre is not present in
   hooks. You will now receive a deprecation warning if you use the get filter
   which does the same thing.

   Custom templates might have to be updated.