chore: bump up rustc version to v1.93.1 (#14542)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [rustc](https://redirect.github.com/rust-lang/rust) | patch | `1.93.0`
→ `1.93.1` |

---

### Release Notes

<details>
<summary>rust-lang/rust (rustc)</summary>

###
[`v1.93.1`](https://redirect.github.com/rust-lang/rust/blob/HEAD/RELEASES.md#Version-1931-2026-02-12)

[Compare
Source](https://redirect.github.com/rust-lang/rust/compare/1.93.0...1.93.1)

\===========================

<a id="1.93.1"></a>

- [Don't try to recover keyword as non-keyword
identifier](https://redirect.github.com/rust-lang/rust/pull/150590),
fixing an ICE that especially [affected
rustfmt](https://redirect.github.com/rust-lang/rustfmt/issues/6739).
- [Fix `clippy::panicking_unwrap` false-positive on field access with
implicit
deref](https://redirect.github.com/rust-lang/rust-clippy/pull/16196).
- [Revert "Update wasm-related dependencies in
CI"](https://redirect.github.com/rust-lang/rust/pull/152259), fixing
file descriptor leaks on the `wasm32-wasip2` target.

</details>

---

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---

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rust-toolchain.toml

@@ -1,3 +1,3 @@
 [toolchain]
-channel = "1.93.0"
+channel = "1.93.1"
 profile = "default"