Update Rust crate reqwest to v0.12.15

[oxide-renovate]

This PR contains the following updates:

Package	Type	Update	Change
reqwest	workspace.dependencies	patch	0.12.12 -> 0.12.15

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Release Notes

seanmonstar/reqwest (reqwest)

v0.12.15

Compare Source

• Fix Windows to support both ProxyOverride and NO_PROXY.
• Fix http3 to support streaming response bodies.
• Fix http3 dependency from public API misuse.

v0.12.14

Compare Source

• Fix missing fetch_mode_no_cors(), marking as deprecated when not on WASM.

v0.12.13

Compare Source

• Add Form::into_reader() for blocking multipart forms.
• Add Form::into_stream() for async multipart forms.
• Add support for SOCKS4a proxies.
• Fix decoding responses with multiple zstd frames.
• Fix RequestBuilder::form() from overwriting a previously set Content-Type header, like the other builder methods.
• Fix cloning of request timeout in blocking::Request.
• Fix http3 synchronization of connection creation, reducing unneccesary extra connections.
• Fix Windows system proxy to use ProxyOverride as a NO_PROXY value.
• Fix blocking read to correctly reserve and zero read buffer.
• (wasm) Add support for request timeouts.
• (wasm) Fix Error::is_timeout() to return true when from a request timeout.

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