Upgrade django_renderpdf

Fixes a bug in the dependency definition of a transitive dependency.

Author: WhyNotHugo

pyproject.toml

@@ -32,7 +32,7 @@ classifiers = [
 dependencies = [
   "cryptography>=3.2,<47",
   "django>=4.2,<5.3",
-  "django_renderpdf>=3.0.0,<6.0.0",
+  "django_renderpdf>=6.0.0,<7.0.0",
   "lxml>=3.4.4",
   "pyopenssl>=16.2.0",
   "setuptools-git>=1.1",