Update dependency undercover to '~> 0.5.0'

This MR contains the following updates:

Package	Update	Change
undercover	minor	'~> 0.4.4' -> '~> 0.5.0'

MR created with the help of gitlab-org/frontend/renovate-gitlab-bot

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Release Notes

grodowski/undercover (undercover)

v0.5.0

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Changed

• Drop ruby 2.x support, require ruby 3.x in gemspec
• Dev dependency updates

v0.4.7

Compare Source

Fixed

• Update of one-line block is ignored by @​lizhangyuh

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