[deps]: Update Rust crate uniffi to v0.26.1 (#538)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [uniffi](https://mozilla.github.io/uniffi-rs)
([source](https://togithub.com/mozilla/uniffi-rs)) | dependencies |
minor | `=0.25.2` -> `=0.26.1` |
| [uniffi](https://mozilla.github.io/uniffi-rs)
([source](https://togithub.com/mozilla/uniffi-rs)) | build-dependencies
| minor | `=0.25.2` -> `=0.26.1` |

---

### Release Notes

<details>
<summary>mozilla/uniffi-rs (uniffi)</summary>

###
[`v0.26.0`](https://togithub.com/mozilla/uniffi-rs/blob/HEAD/CHANGELOG.md#v0260-backend-crates-v0260---2024-01-23)

[Compare
Source](https://togithub.com/mozilla/uniffi-rs/compare/v0.25.3...0.26.0)

##### What's changed?

- The `rust_future_continuation_callback_set` FFI function was removed.
`rust_future_poll` now
inputs the callback pointer. External bindings authors will need to
update their code.

##### What's new?

- Rust traits `Display`, `Hash` and `Eq` exposed to Kotlin and Swift
[#&#8203;1817](https://togithub.com/mozilla/uniffi-rs/pull/1817)
- Foreign types can now implement trait interfaces
[#&#8203;1791](https://togithub.com/mozilla/uniffi-rs/pull/1791) and
[the
documentation](https://mozilla.github.io/uniffi-rs/udl/interfaces.html#foreign-implementations)
    -   UDL: use the `[WithForeign]` attribute
    -   proc-macros: use the `#[uniffi::export(with_foreign)]` attribute
- Generated Python code is able to specify a package name for the module
[#&#8203;1784](https://togithub.com/mozilla/uniffi-rs/pull/1784)
- UDL can describe async function
[#&#8203;1834](https://togithub.com/mozilla/uniffi-rs/pull/1834)
- UDL files can reference types defined in procmacros in this crate -
see
[the external types
docs](https://mozilla.github.io/uniffi-rs/udl/ext_types.html)
and also external trait interfaces
[#&#8203;1831](https://togithub.com/mozilla/uniffi-rs/issues/1831)
- Add support for docstrings via procmacros
[#&#8203;1862](https://togithub.com/mozilla/uniffi-rs/pull/1862)
and [in UDL](https://mozilla.github.io/uniffi-rs/udl/docstrings.html)
- Objects can now be returned from functions/constructors/methods
without wrapping them in an `Arc<>`.

[All changes in
v0.26.0](https://togithub.com/mozilla/uniffi-rs/compare/v0.25.2...v0.26.0).

###
[`v0.25.3`](https://togithub.com/mozilla/uniffi-rs/blob/HEAD/CHANGELOG.md#v0253-backend-crates-v0253---2023-12-07)

[Compare
Source](https://togithub.com/mozilla/uniffi-rs/compare/v0.25.2...v0.25.3)

[All changes in
v0.25.3](https://togithub.com/mozilla/uniffi-rs/compare/v0.25.2...v0.25.3).

- Switched to a patched version of `oneshot` so that consumers who use
`cargo vendor` don't vendor
    `loom` and it's sub-dependencies like `windows`

</details>

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Cargo.toml

@@ -21,11 +21,3 @@ codegen-units = 1
 # Stripping the binary reduces the size by ~30%, but the stacktraces won't be usable anymore.
 # This is fine as long as we don't have any unhandled panics, but let's keep it disabled for now
 # strip = true
-
-# Using git dependency temporarily to add support for immutable records in generated code
-[patch.crates-io]
-uniffi = { git = "https://github.com/mozilla/uniffi-rs", rev = "23711c8151bbb794369aa1f9d383db386792dff9" }
-uniffi_build = { git = "https://github.com/mozilla/uniffi-rs", rev = "23711c8151bbb794369aa1f9d383db386792dff9" }
-uniffi_bindgen = { git = "https://github.com/mozilla/uniffi-rs", rev = "23711c8151bbb794369aa1f9d383db386792dff9" }
-uniffi_core = { git = "https://github.com/mozilla/uniffi-rs", rev = "23711c8151bbb794369aa1f9d383db386792dff9" }
-uniffi_macros = { git = "https://github.com/mozilla/uniffi-rs", rev = "23711c8151bbb794369aa1f9d383db386792dff9" }