chore(deps): update dependency build_bazel_rules_swift to v1.9.1 (#111)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [build_bazel_rules_swift](https://togithub.com/bazelbuild/rules_swift)
| http_archive | patch | `1.9.0` -> `1.9.1` |

---

### Release Notes

<details>
<summary>bazelbuild/rules_swift (build_bazel_rules_swift)</summary>

###
[`v1.9.1`](https://togithub.com/bazelbuild/rules_swift/releases/tag/1.9.1)

[Compare
Source](https://togithub.com/bazelbuild/rules_swift/compare/1.9.0...1.9.1)

##### What's Changed

- Upgrade index-import to fix a bug with `swift.use_global_index_store`

This release is compatible with 5.x LTS, 6.x LTS, and bazel 7.x rolling
releases

##### MODULE.bazel Snippet

```bzl
bazel_dep(name = "rules_swift", version = "1.9.1", repo_name = "build_bazel_rules_swift")
```

##### Workspace Snippet

```bzl
load("@&#8203;bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")

http_archive(
    name = "build_bazel_rules_swift",
    sha256 = "b3b6c5c9f2a589150f71e79dec1e1ed0eb974dbd49e9317df4e09e08ff6e83df",
    url = "https://github.com/bazelbuild/rules_swift/releases/download/1.9.1/rules_swift.1.9.1.tar.gz",
)

load(
    "@&#8203;build_bazel_rules_swift//swift:repositories.bzl",
    "swift_rules_dependencies",
)

swift_rules_dependencies()

load(
    "@&#8203;build_bazel_rules_swift//swift:extras.bzl",
    "swift_rules_extra_dependencies",
)

swift_rules_extra_dependencies()
```

</details>

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swifttidy/deps.bzl

@@ -27,6 +27,6 @@ def swifttidy_rules_dependencies():
     maybe(
         http_archive,
         name = "build_bazel_rules_swift",
-        sha256 = "7929b4fd6d9f7c44ed5734a15004bfc2046146ba5ea269f0568d9efe2f405ef3",
-        url = "https://github.com/bazelbuild/rules_swift/releases/download/1.9.0/rules_swift.1.9.0.tar.gz",
+        sha256 = "b3b6c5c9f2a589150f71e79dec1e1ed0eb974dbd49e9317df4e09e08ff6e83df",
+        url = "https://github.com/bazelbuild/rules_swift/releases/download/1.9.1/rules_swift.1.9.1.tar.gz",
     )