Yeah, the 'h' has been dropped.
If you want to re-change every document then it's going to be time-consuming and a lot of work.
What you can do: If the name in your dad's passport is correct.... then do include a couple of other documents which are considered as ID proofs (Driver's License/Aadhar Card/Electoral Voters Card, etc).... and mention this error in the Cover Letter
All the best
Should i include my dads ID proofs (Driver's License/Aadhar Card/Electoral Voters Card, etc) and mention his name is misspelled in my passport. That waht you are saying?