V2 has broken liks too see #1309 (#1310)

* fix broken links for the v2 branch

v2 brach has broken links to read the docs too

I additionally found a link to the git hub master tree, which should be
changed to main.

* #1295 github link fixed (master->v2)

Co-authored-by: Peter Paul Kiefer <dafisppk@gmail.com>

Author: ppk42

docs/filtering.rst

@@ -2,9 +2,9 @@ Filtering
 =========
 
 Graphene-Django integrates with
-`django-filter <https://django-filter.readthedocs.io/en/master/>`__ (2.x for
+`django-filter <https://django-filter.readthedocs.io/en/main/>`__ (2.x for
 Python 3 or 1.x for Python 2) to provide filtering of results. See the `usage
-documentation <https://django-filter.readthedocs.io/en/master/guide/usage.html#the-filter>`__
+documentation <https://django-filter.readthedocs.io/en/main/guide/usage.html#the-filter>`__
 for details on the format for ``filter_fields``.
 
 This filtering is automatically available when implementing a ``relay.Node``.
@@ -27,15 +27,15 @@ After installing ``django-filter`` you'll need to add the application in the ``s
     ]
 
 Note: The techniques below are demoed in the `cookbook example
-app <https://github.com/graphql-python/graphene-django/tree/master/examples/cookbook>`__.
+app <https://github.com/graphql-python/graphene-django/tree/v2/examples/cookbook>`__.
 
 Filterable fields
 -----------------
 
 The ``filter_fields`` parameter is used to specify the fields which can
 be filtered upon. The value specified here is passed directly to
 ``django-filter``, so see the `filtering
-documentation <https://django-filter.readthedocs.io/en/master/guide/usage.html#the-filter>`__
+documentation <https://django-filter.readthedocs.io/en/main/guide/usage.html#the-filter>`__
 for full details on the range of options available.
 
 For example:
@@ -163,7 +163,7 @@ in unison  with the ``filter_fields`` parameter:
         animal = relay.Node.Field(AnimalNode)
         all_animals = DjangoFilterConnectionField(AnimalNode)
 
-The context argument is passed on as the `request argument <http://django-filter.readthedocs.io/en/master/guide/usage.html#request-based-filtering>`__
+The context argument is passed on as the `request argument <http://django-filter.readthedocs.io/en/main/guide/usage.html#request-based-filtering>`__
 in a ``django_filters.FilterSet`` instance. You can use this to customize your
 filters to be context-dependent. We could modify the ``AnimalFilter`` above to
 pre-filter animals owned by the authenticated user (set in ``context.user``).