fix: `cargo update` to target available cosmic-text commit

[jokeyrhyme]

one naive attempt at addressing:

cosmic-applibrary on  master_jammy is 📦 v0.1.0 via 🦀 v1.72.1
nu ❯ cargo build --release
    Updating crates.io index
    Updating git repository `https://github.com/pop-os/libcosmic/`
    Updating git submodule `https://github.com/pop-os/cosmic-design-demo`
    Updating git submodule `https://github.com/pop-os/iced.git`
    Updating git repository `https://github.com/pop-os/cosmic-protocols`
    Updating git repository `https://github.com/pop-os/dbus-settings-bindings`
    Updating git repository `https://github.com/DioxusLabs/taffy`
    Updating git repository `https://github.com/smithay/client-toolkit`
    Updating git repository `https://github.com/jackpot51/rust-atomicwrites`
    Updating git repository `https://github.com/pop-os/cosmic-text.git`
error: failed to get `cosmic-text` as a dependency of package `iced_tiny_skia v0.12.0 (https://github.com/pop-os/libcosmic/#481cd5a0)`
    ... which satisfies git dependency `iced_tiny_skia` (locked to 0.12.0) of package `libcosmic v0.1.0 (https://github.com/pop-os/libcosmic/#481cd5a0)`
    ... which satisfies git dependency `libcosmic` (locked to 0.1.0) of package `cosmic-app-library v0.1.0 (/home/ron/GitHub/pop-os/cosmic-applibrary)`

Caused by:
  failed to load source for dependency `cosmic-text`

Caused by:
  Unable to update https://github.com/pop-os/cosmic-text.git?branch=refactor#6abf336e

Caused by:
  object not found - no match for id (6abf336e6df08771d80232b2d6853269be34ee28); class=Odb (9); code=NotFound (-3)

• tested manually, launcher appears, displays app icons+labels in a grid, and can start selected app

[jokeyrhyme]

FYI @wash2

[jokeyrhyme]

Thanks! :D