Update changelog

(cherry picked from commit 3c317132)

CHANGELOG.rst

@@ -13,16 +13,21 @@ Added
 ~~~~~
 
 * Show also group ownerships on person detail page
+* [Dev] Provide plain PDF template without header/footer for special layouts.
 
 Changed
 ~~~~~~~
 
 * OIDC scope "profile" now exposes the avatar instead of the official photo
+* [Dev] Provide function to generate PDF files from fully-rendered templates.
 
 Fixed
 ~~~~~
 
 * Error message in permission form was misleading.
+* The logo in the PDF files was displayed at the wrong position.
+* Sometimes the PDF files were not generated correctly
+  and images were displayed only partially.
 
 `2.11.1`_ - 2022-08-31
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