Bump rgb from 0.8.44 to 0.8.50

[dependabot[bot]]

Bumps rgb from 0.8.44 to 0.8.50.

Changelog

Sourced from rgb's changelog.

0.8.50

• Added .value_mut() getter on grayscale pixel types to avoid direct field access.
• Deprecated map_rgb() which is yet another dupe of map_colors().

0.8.49

• Added .value() getter on grayscale pixel types to avoid direct field access.

0.8.48

• Deprecated alt::GRAY8-alt::GRAYA16 type aliases, because they will be moved in the next major version.

0.8.47

• Renamed map_c to map_colors
• Added rgb::prelude::* for imoporting traits without naming them (for forward-compatibilty)

0.8.46

• Changed AsRef to dereference as arrays instead of slices (AsRef`)

0.8.45

• Added From for 1-tuples

Commits

• b2e65a2 value_mut
• a9a1555 Forward-compat for gray
• d6afb5b Bump
• f0fb5d4 Future-proof GRAY8 imports
• b744a92 Changelog
• 043d8fe Backport examples
• 51d0fc3 Add forward-compatible AsRef
• a534116 Add missing bytemuck
• 802828b Deprecate map_c
• 7bf2145 Prelude
• Additional commits viewable in compare view

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[dependabot[bot]]

Looks like rgb is up-to-date now, so this is no longer needed.