chore(deps): update dependency ex_doc to ~> 0.30

[renovate]

This PR contains the following updates:

Package	Update	Change
ex_doc	minor	~> 0.27 -> ~> 0.30

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[github-actions]

Pull Request Test Coverage Report for Build 53582564185871757cddb3bdb5169f6d0f23e9b1

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 5 unchanged lines in 4 files lost coverage.
• Overall coverage decreased (-0.08%) to 54.903%

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Files with Coverage Reduction	New Missed Lines	%
lib/godwoken_explorer/address.ex	1	66.67%
lib/godwoken_explorer/chain.ex	1	64.29%
lib/godwoken_explorer/graphql/types/custom/bigint.ex	1	0.0%
lib/godwoken_explorer/graphql/types/custom/custom.ex	2	3.33%

Totals
Change from base Build a310d2330b7f2e62e6d036518ccc28dd36da0c27:	-0.08%
Covered Lines:	3298
Relevant Lines:	6007

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💛 - Coveralls