Update Rust crate proc-macro2 to v1.0.94 (#16586)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [proc-macro2](https://redirect.github.com/dtolnay/proc-macro2) |
workspace.dependencies | patch | `1.0.93` -> `1.0.94` |

---

> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.

---

### Release Notes

<details>
<summary>dtolnay/proc-macro2 (proc-macro2)</summary>

###
[`v1.0.94`](https://redirect.github.com/dtolnay/proc-macro2/releases/tag/1.0.94)

[Compare
Source](https://redirect.github.com/dtolnay/proc-macro2/compare/1.0.93...1.0.94)

-   Documentation improvements

</details>

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Cargo.lock

@@ -2243,9 +2243,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.93"
+version = "1.0.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
+checksum = "a31971752e70b8b2686d7e46ec17fb38dad4051d94024c88df49b667caea9c84"
 dependencies = [
  "unicode-ident",
 ]