If you are looking for the official update notes , this version primarily finalized the content and addressed bugs following the expansion's launch.
The text you are referring to is likely associated with the of Age of Wonders: Planetfall , released around December 2020. File: Age.of.Wonders.Planetfall.v1.4.0.3.zip ...
: Adds the Oathbound faction and the Grail Configurations. Invasions : Introduces the Shakarn and Therians. If you are looking for the official update
Age of Wonders: Planetfall Season Pass - Paradox Interactive File: Age.of.Wonders.Planetfall.v1.4.0.3.zip ...
This specific version (v1.4.0.3) is often found on game distribution sites like Download.ir and typically includes the base game along with its major expansions:
: Adds the Heritor faction and ancient empire secrets.