Update AR reload doc for the case of manually set primary key attribute [ci skip]
Merge pull request #12418 from makaroni4/fix/ar_reload_doc_12101

Update AR reload doc for the case of manually set primary key attribute [ci skip]
improving `reload` doc wording. #12418 [ci skip]
unify `Fixes` notes in AR changelog. [ci skip].
Added activemodel as a explicit dependency

As we have other dependency explicitly here
it's fine to add activemodel as well
Merge pull request #12426 from arunagw/added_activemodel_in_railsgemspec

Added activemodel as a explicit dependency