Update Django et al

pyproject.toml

@@ -3,7 +3,7 @@ name = "timetracker"
 version = "1.6.0"
 description = "A simple time tracker."
 authors = [{ name = "Lukáš Kucharczyk", email = "lukas@kucharczyk.xyz" }]
-requires-python = ">=3.11,<4"
+requires-python = ">=3.13,<4"
 readme = "README.md"
 license = "AGPL-3.0-or-later"
 classifiers = [
@@ -14,19 +14,19 @@ classifiers = [
     "Programming Language :: Python :: 3.14",
 ]
 dependencies = [
-    "django>=5.0.6,<6",
+    "django>6.0",
     "gunicorn>=23.0.0,<24",
     "uvicorn>=0.30.1,<0.31",
     "graphene-django>=3.2.0,<4",
     "django-htmx>=1.18.0,<2",
     "django-template-partials>=24.2,<25",
     "markdown>=3.6,<4",
-    "django-cotton>=1.2.1,<2",
+    "django-cotton==2.3",
     "django-q2>=1.7.4,<2",
     "croniter>=5.0.1,<6",
     "requests>=2.32.3,<3",
     "pyyaml>=6.0.2,<7",
-    "django-ninja>=1.3.0,<2",
+    "django-ninja>1.5",
 ]
 
 [project.scripts]