chore(deps): update dependency mint to v1.9.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
mint (source)	prod	minor	== 1.8.0 → == 1.9.0

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Release Notes

elixir-mint/mint (mint)

v1.9.0

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Security

• Validate the HTTP/1.1 request method as an RFC 9110 token, rejecting CRLF and other control characters. Forwarding attacker-controlled input as the request method was exposed to CRLF injection (request header injection and request smuggling). Fixes GHSA-2pg6-44cx-c49v.
• Reject HTTP/1.1 content-length header values that are not strictly 1*DIGIT, so signed values (such as +0) and embedded whitespace no longer parse as valid lengths. This parser disagreement with a strict fronting proxy was a response-smuggling primitive. Fixes GHSA-mjqx-c6f6-7rc2.
• Bound the HTTP/2 accumulated header block by the locally advertised SETTINGS_MAX_HEADER_LIST_SIZE (now defaulting to 256 KB instead of :infinity), so a malicious server can no longer exhaust client memory with an unbounded chain of CONTINUATION frames. Fixes GHSA-2p26-p43x-fhp8.
• Count reserved HTTP/2 streams against max_concurrent_streams at PUSH_PROMISE time and refuse promises past the limit with RST_STREAM, so a malicious server can no longer exhaust client memory by flooding PUSH_PROMISE frames. Fixes GHSA-g586-ccqf-7x4r.

Bug Fixes and Improvements

• Mint.HTTP.stream/2 now returns :unknown (not :unknown_message) when given a message it does not recognize.

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