update requirements.txt

Author: benvanwerkhoven

doc/requirements.txt

@@ -18,7 +18,7 @@ domdf-python-tools==3.8.0.post2 ; python_version >= "3.8" and python_version < "
 exceptiongroup==1.2.0 ; python_version >= "3.8" and python_version < "3.11"
 executing==2.0.1 ; python_version >= "3.8" and python_version < "3.12"
 fastjsonschema==2.19.1 ; python_version >= "3.8" and python_version < "3.12"
-idna==3.6 ; python_version >= "3.8" and python_version < "3.12"
+idna==3.7 ; python_version >= "3.8" and python_version < "3.12"
 imagesize==1.4.1 ; python_version >= "3.8" and python_version < "3.12"
 importlib-metadata==7.0.1 ; python_version >= "3.8" and python_version < "3.10"
 importlib-resources==6.1.1 ; python_version >= "3.8" and python_version < "3.9"