build(deps-dev): update python-dotenv requirement from <1.2 to <1.3

Updates the requirements on [python-dotenv](https://github.com/theskumar/python-dotenv) to permit the latest version.
- [Release notes](https://github.com/theskumar/python-dotenv/releases)
- [Changelog](https://github.com/theskumar/python-dotenv/blob/main/CHANGELOG.md)
- [Commits](theskumar/python-dotenv@v0.1.1...v1.2.1)

---
updated-dependencies:
- dependency-name: python-dotenv
  dependency-version: 1.2.1
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

setup.py

@@ -43,7 +43,7 @@
             "pytest<10",
             "pytest-cache<2",
             "pytest-cov<7.1",
-            "python-dotenv<1.2",
+            "python-dotenv<1.3",
             "responses<0.26",
         ],
     },