fix: Fix metadata filter resource (box/box-openapi#419)

[coveralls]

Pull Request Test Coverage Report for Build 9005609275

Details

• 10 of 12 (83.33%) changed or added relevant lines in 4 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.05%) to 89.07%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
box_sdk_gen/internal/utils.py	2	4	50.0%
<!--	Total:	10	12	83.33%	-->

Totals
Change from base Build 8970619526:	0.05%
Covered Lines:	8581
Relevant Lines:	9634

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💛 - Coveralls