Update wiremock to 0.6.4 (#14238)

<!--
Thank you for contributing to uv! To help us out with reviewing, please
consider the following:

- Does this pull request include a summary of the change? (See below.)
- Does this pull request include a descriptive title?
- Does this pull request include references to any relevant issues?
-->

## Summary

In e10881d49c, `uv` started using a fork
of the `wiremock` crate, https://github.com/astral-sh/wiremock-rs,
linking companion PR
https://github.com/LukeMathWalker/wiremock-rs/pull/159. That PR was
merged in `wiremock` 0.6.4, so this PR switches back to the crates.io
version of `wiremock`, with a minimum version of 0.6.4.
<!-- What's the purpose of the change? What does it do, and why? -->

## Test Plan

```
$ cargo run python install
$ cargo test
````

Cargo.lock

@@ -6700,8 +6700,9 @@ checksum = "d135d17ab770252ad95e9a872d365cf3090e3be864a34ab46f48555993efc904"
 
 [[package]]
 name = "wiremock"
-version = "0.6.3"
-source = "git+https://github.com/astral-sh/wiremock-rs?rev=b79b69f62521df9f83a54e866432397562eae789#b79b69f62521df9f83a54e866432397562eae789"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a2b8b99d4cdbf36b239a9532e31fe4fb8acc38d1897c1761e161550a7dc78e6a"
 dependencies = [
  "assert-json-diff",
  "async-trait",

Cargo.toml

@@ -189,7 +189,7 @@ windows-core = { version = "0.59.0" }
 windows-registry = { version = "0.5.0" }
 windows-result = { version = "0.3.0" }
 windows-sys = { version = "0.59.0", features = ["Win32_Foundation", "Win32_Security", "Win32_Storage_FileSystem", "Win32_System_Ioctl", "Win32_System_IO", "Win32_System_Registry"] }
-wiremock = { git = "https://github.com/astral-sh/wiremock-rs", rev = "b79b69f62521df9f83a54e866432397562eae789" }
+wiremock = { version = "0.6.4" }
 xz2 = { version = "0.1.7" }
 zip = { version = "2.2.3", default-features = false, features = ["deflate", "zstd", "bzip2", "lzma", "xz"] }