fix(deps): update rust crate string_cache to v0.9.0 (#2232)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [string_cache](https://redirect.github.com/servo/string-cache) |
dependencies | minor | `=0.8.9` -> `=0.9.0` |

---

### Release Notes

<details>
<summary>servo/string-cache (string_cache)</summary>

###
[`v0.9.0`](https://redirect.github.com/servo/string-cache/compare/v0.8.9...v0.9.0)

[Compare
Source](https://redirect.github.com/servo/string-cache/compare/v0.8.9...v0.9.0)

</details>

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packages/swc/Cargo.lock

@@ -15,7 +15,7 @@ lto = true
 rust-ini = "=0.21.3"
 serde = "=1.0.219"
 serde_json = "=1.0.140"
-string_cache = "=0.8.9"
+string_cache = "=0.9.0"
 swc_core = { version = "=21.0.1", features = [
   "ecma_plugin_transform",
   "ecma_ast_serde",