website/docs: prepare 2021.10.4 docs

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

website/docs/releases/v2021.10.md

@@ -201,6 +201,24 @@ A huge shoutout to all the people that contributed, helped test and also transla
 - web/user: fix empty page when no sources to connect exist
 - web/user: fix redirect after starting configuration flow from user interface
 
+## Fixed in 2021.10.4
+
+- core: force lowercase emails for gravatar usage
+- outposts: fix MFA Challenges not working with outpost
+- outposts/ldap: fix logic error in cached ldap searcher
+- outposts/proxy: fix static files not being served in proxy mode
+- providers/proxy: return list of configured scope names so outpost requests custom scopes
+- root: use python slim-bullseye as base
+- sources/ldap: fix user/group sync overwriting attributes instead of merging them
+- sources/ldap: set connect/receive timeout (default to 15s)
+- stages/*: disable trim_whitespace on important fields
+- stages/authenticator_duo: fix devices created with name
+- stages/authenticator_validate: enable all device classes by default
+- web: write interfaces to different folders and remove custom chunk names
+- web/admin: fix display issues with flow execute buttons
+- web/admin: show warnings above tab bar
+- web/admin: use more natural default ordering for objects
+
 ## Upgrading
 
 This release does not introduce any new requirements.