chore: bump skrifa + harfrust

[akx]

This makes the default build's dep graph unify on a single read-fonts 0.39.x + single version of skrifa.

Before

~/b/cosmic-text (main) $ git rev-parse HEAD
c24886c2471e5606587c46090cd25dbbf209186b
~/b/cosmic-text (main) $ cargo build -q
~/b/cosmic-text (main) $ cargo tree -d -e normal
read-fonts v0.37.0
├── harfrust v0.5.2
│   └── cosmic-text v0.19.0 (/Users/akx/build/cosmic-text)
└── skrifa v0.40.0
    └── cosmic-text v0.19.0 (/Users/akx/build/cosmic-text)
read-fonts v0.39.2
└── skrifa v0.42.1
    └── swash v0.2.9
        └── cosmic-text v0.19.0 (/Users/akx/build/cosmic-text)
skrifa v0.40.0 (*)
skrifa v0.42.1 (*)

After

~/b/cosmic-text (skrifa-042) $ cargo build -q
~/b/cosmic-text (skrifa-042) $ cargo tree -d -e normal
warning: nothing to print.

harfrust's shape_with_plan had become private in 0.8.0, so change that use.

---

• I have disclosed use of any AI generated code in my commit messages.
• I understand these changes in full and will be able to respond to review comments.
• My change is accurately described in the commit message.
• My contribution is tested and working as described.
  • cargo test passes, and an upstream app using this code seems to work as before.
• I have read the Developer Certificate of Origin and certify my contribution under its conditions.

[akx]

Hmm... It built fine on my machine 😅

[hojjatabdollahi]

Make sure to compile it with no-std feature too.