Add version 1.21.11 details to the changelog (#939)

Author: JoelLefkowitz

docs/changelog.rst

@@ -2,6 +2,19 @@
 Changelog
 #########
 
+***********
+**1.21.11**
+***********
+
+**FIXED:** Fix list views with parameters in last path segment not named "list" views (:pr:`917`)
+**ADDED:** Allow overriding produces/consumes with @swagger_auto_schema decorator (:pr:`916`)
+**FIXED:** Fix filter parameters not appearing in swagger with django-filter>=25 (:pr:`926`)
+**IMPROVED:** Update Python, Django, and DRF versions and packaging configuration (:pr:`922`)
+**IMPROVED:** Remove usage of pkg_resources (:pr:`928`)
+**FIXED:** Fix call_view_method warning to include the method name again (:pr:`923`)
+**ADDED:** Add a hide download button option (:pr:`848`)
+**ADDED:** Add ruff linters (:pr:`903`)
+
 ***********
 **1.21.10**
 ***********