build(deps): bump idna in /tests/opentelemetry-docker-tests/tests

Bumps [idna](https://github.com/kjd/idna) from 2.10 to 3.7.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.rst)
- [Commits](kjd/idna@v2.10...v3.7)

---
updated-dependencies:
- dependency-name: idna
  dependency-version: '3.7'
  dependency-type: direct:production
...

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

Author: dependabot[bot]

tests/opentelemetry-docker-tests/tests/test-requirements.txt

@@ -27,7 +27,7 @@ flaky==3.7.0
 flask==3.0.2
 greenlet==3.0.3
 grpcio==1.63.2
-idna==2.10
+idna==3.7
 iniconfig==2.0.0
 jsonschema==3.2.0
 kombu==5.3.5