fix(deps): update dependency python-dotenv to >=1.2.1,<1.3

Author: renovate[bot]

amp_demos/python/flask/pyproject.toml

@@ -4,7 +4,7 @@ version = "0.1.0"
 description = "An application to demo using Amp with Python and Flask"
 readme = "README.md"
 requires-python = ">=3.14.0"
-dependencies = ["flask>=3.1.2,<3.2", "python-dotenv>=1.1.1,<1.2"]
+dependencies = ["flask>=3.1.2,<3.2", "python-dotenv>=1.2.1,<1.3"]
 
 [project.optional-dependencies]
 dev = ["pytest>=8.4.2", "pytest-flask>=1.3.0", "black>=25.9.0", "flake8>=7.3.0"]