Fix entrypoint block types to be optional

[Bo98]

Noticed that these were incorrect and were not nilable like all of the other block signatures. These can be nil because KubeDSL::DSLObject's initializer accepts a nil block:

kube-dsl/lib/kube-dsl/dsl_object.rb

Lines 10 to 13 in 34b9557

	T::Sig::WithoutRuntime.sig { params(block: T.nilable(T.proc.bind(::KubeDSL::DSLObject).void)).void }
	def initialize(&block)
	instance_eval(&block) if block
	end

[camertron]

Ah cool, nice catch 👍

[camertron]

Published in v0.8.2 🎉