Drop support for Python 3.9

Change-Id: I3e87c7bfec639afdc204f265dfbe924339665e74

releasenotes/notes/drop-python-39.yaml

@@ -0,0 +1,4 @@
+---
+upgrade:
+  - |
+    Support for Python 3.9 has been dropped.

setup.cfg

@@ -5,8 +5,8 @@ description_file =
     README.rst
 author = OpenStack
 author_email = openstack-discuss@lists.openstack.org
-home_page = https://docs.openstack.org/developer/designate-dashboard/
-python_requires = >=3.9
+home_page = https://docs.openstack.org/designate-dashboard/latest/
+python_requires = >=3.10
 classifier =
     Environment :: OpenStack
     Intended Audience :: Information Technology
@@ -17,10 +17,10 @@ classifier =
     Programming Language :: Python :: Implementation :: CPython
     Programming Language :: Python :: 3 :: Only
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
     Programming Language :: Python :: 3.12
+    Programming Language :: Python :: 3.13
 
 [files]
 packages =