build(deps): bump idna from 3.11 to 3.12 in /clients/py

Bumps [idna](https://github.com/kjd/idna) from 3.11 to 3.12.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.rst)
- [Commits](kjd/idna@v3.11...v3.12)

---
updated-dependencies:
- dependency-name: idna
  dependency-version: '3.12'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

clients/py/requirements.txt

@@ -5,7 +5,7 @@ construct-typing==0.7.0
 h11==0.14.0
 httpcore==1.0.8
 httpx==0.28.1
-idna==3.11
+idna==3.12
 jsonalias==0.1.1
 sniffio==1.3.1
 solana==0.36.11