python-requests: update to 2.34.2

python-requests: update to 2.34.2

Fixes:
- Moved "headers" input type back to Mapping to avoid invariance issues
  with MutableMapping and inferred dict types.
  Users calling Request.headers.update() may need to narrow typing in code
  (Closes #7441).

Security:
- CVE-2026-25645: Fixed extract_zipped_paths to extract contents to
  a non-deterministic temp directory, to prevent malicious file replacement.
  Does not affect default usage of Requests, only apps calling this utility
  directly.

Changelog:
https://github.com/psf/requests/releases/tag/v2.34.2

Signed-off-by: Alexandru Ardelean <redacted>