fix(deps): update dependency mykso/myks to v5.8.1

[renovate]

This PR contains the following updates:

Package	Update	Change
mykso/myks	minor	v5.6.0 → v5.8.1

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Release Notes

mykso/myks (mykso/myks)

v5.8.1

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Bug Fixes

• deps: update golang dependencies (non-major) (#​725) (fd93406)
• validate rendered vendir config (#​726) (f0158c1)

v5.8.0

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Features

• add buffer option for plugin output handling (#​720) (3ec3442)

Bug Fixes

• deps: update module github.com/alecthomas/chroma/v2 to v2.23.1 (#​719) (5012c04)
• speed up shell completions for environments and applications (#​722) (3107b6d)

v5.7.0

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Features

• improve output and error handling for external plugins (#​716) (79c1655)

Bug Fixes

• deps: update golang dependencies (non-major) (#​710) (ac2ffa7)
• deps: update module github.com/alecthomas/chroma/v2 to v2.23.0 (#​714) (1da2aca)

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