fix: multiple generic types

[defaulterrr]

Hey there! While working with minimock, i've discovered another missed bug with my recent contributions

This time this interface

type genericMultipleTypes[T proto.Message, K any] interface {
    Name(T,K)
}

would be improperly generated into (missing comma between types):

type GenericMultipleTypesMock[T proto.MessageK any] struct {
...
}

What i did:

• Added a new regress test for such case (reflected in first commit and in snapshots)
• Implemented a minor code fix for such cases

Looking forward for a review!

[hexdigest]

Hey @defaulterrr ,

You can find this fix in v3.1.3