Update django requirement from <6,>=4.2 to >=6.1.1,<7

Updates the requirements on [django](https://github.com/django/django) to permit the latest version.
- [Commits](django/django@4.2...6.1.1)

---
updated-dependencies:
- dependency-name: django
  dependency-version: 6.1.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -4,7 +4,7 @@ django-tagging
 pytz
 git+https://github.com/graphite-project/whisper.git#egg=whisper
 git+https://github.com/graphite-project/ceres.git#egg=ceres
-Django<6
+Django<7
 pyparsing>=3.0.6
 alabaster==1.0.0
 Sphinx==8.2.1

requirements.txt

@@ -35,7 +35,7 @@
 #   deactivate
 #
 
-Django>=4.2,<6
+Django>=6.1.1,<7
 python-memcached>=1.58
 txAMQP>=0.8.2,<0.9
 django-tagging

setup.py

@@ -116,7 +116,7 @@ def read(fname):
         scripts=glob("bin/*"),
         data_files=list(webapp_content.items()) + storage_dirs + conf_files + examples,
         install_requires=[
-            "Django>=4.2,<6",
+            "Django>=4.2,<7",
             "django-tagging",
             "pytz",
             "pyparsing",