fix(deps): update idna requirement from >=3.17 to >=3.18

Updates the requirements on [idna](https://github.com/kjd/idna) to permit the latest version.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.md)
- [Commits](kjd/idna@v3.17...v3.18)

---
updated-dependencies:
- dependency-name: idna
  dependency-version: '3.18'
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -28,7 +28,7 @@ dependencies = [
     "pytest-cov>=7.1.0,<8",
     "twine>=6.2.0,<7",
     "black>=26.5.1,<27",
-    "idna>=3.17"
+    "idna>=3.18"
 ]
 classifiers = [
     "Programming Language :: Python :: 3",