build: update dependency marshmallow to v2.21.0 - autoclosed

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
marshmallow (changelog)	==2.20.1 -> ==2.21.0

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Release Notes

marshmallow-code/marshmallow

v2.21.0

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v2.20.5

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v2.20.4

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v2.20.3

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v2.20.2

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Configuration

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