Update Rust crate ntfy to 0.6.0

This MR contains the following updates:

Package	Type	Update	Change
ntfy	dependencies	minor	0.5.0 -> 0.6.0

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Release Notes

shadowylab/ntfy (ntfy)

v0.6.0

Compare Source

Full Changelog: https://github.com/shadowylab/ntfy/compare/v0.5.0...v0.6.0

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