Update libcosmic dependency

[kamcnally]

Update libcosmic to fix icon rendering crashes

Updates libcosmic dependency to pull in upstream fixes from pop-os/iced that prevent crashes when encountering invalid or malformed icon files.

This was done with cargo update -p libcosmic

Background

Issue pop-os/cosmic-epoch#2452 reported crashes in both cosmic-launcher and cosmic-applibrary when encountering malformed SVG icons. This was fixed upstream in pop-os/iced#249 by wrapping resvg::render in a panic handler.

I encountered a similar crash when Tizen Studio .desktop files reference binary .ico icon files (which violate the freedesktop.org icon spec). The crash manifests as:

thread 'main' panicked at library/core/src/slice/sort/shared/smallsort.rs:860:5:
user-provided comparison function does not correctly implement a total order

The root cause appears to be the same - icon parsing failures corrupting application metadata. Updating libcosmic to include the iced fixes resolves both the SVG and .ico crashes.

Changes

• Updated libcosmic dependency to version with iced icon rendering fixes

Testing

• No longer crashes with Tizen Studio .desktop files (binary .ico icons)
• Launcher remains functional when encountering malformed icons

Fixes

Fixes pop-os/cosmic-epoch#2452 - SVG rendering crashes (mentions applibrary launcher)

Related

• fix: prevent crashes from SVG rendering iced#249 - Icon rendering panic handler fix
• Update dependencies cosmic-launcher#385 - Similar dep update for cosmic-launcher

Third-party applications may use non-standard icon formats. The launcher should handle these gracefully instead of crashing.