Docs: add comtypes.clients to mock list when build the docs on Linux
Docs: add comtypes.clients to mock list when build the docs on Linux

vasily-v-ryabov/pywinauto,MagazinnikIvan/pywinauto,cetygamer/pywinauto,pywinauto/pywinauto,airelil/pywinauto,drinkertea/pywinauto