Add missing ToC entry in release notes
diff --git a/docs/release-notes.md b/docs/release-notes.md
index 80ee328..5eb7f33 100644
--- a/docs/release-notes.md
+++ b/docs/release-notes.md
@@ -2,6 +2,7 @@
 
 # Release notes
 **Contents**<br>
+[2.11.1](#2111)<br>
 [2.11.0](#2110)<br>
 [2.10.2](#2102)<br>
 [2.10.1](#2101)<br>