Fix bugbear exception chaining

Author: staticdev

noxfile.py

@@ -14,7 +14,7 @@
     Nox failed to import the 'nox-poetry' package.
     Please install it using the following command:
     {sys.executable} -m pip install nox-poetry"""
-    raise SystemExit(dedent(message))
+    raise SystemExit(dedent(message)) from None
 
 
 package = "django_sorting_bootstrap"

src/django_sorting_bootstrap/templatetags/sorting_tags.py

@@ -174,7 +174,7 @@ def auto_sort(parser, token):
     except ValueError:
         raise template.TemplateSyntaxError(
             "{} tag requires a single argument".format(token.contents.split()[0])
-        )
+        ) from None
     return SortedQuerysetNode(queryset)