Add release notes for 2.2.1

CHANGELOG.txt

@@ -10,6 +10,12 @@ Changelog
  * Fix: Respect next param on login (Loic Teixeira)
 
 
+2.2.1 (13.08.2018)
+~~~~~~~~~~~~~~~~~~
+
+ * Fix: Pin Beautiful Soup to 4.6.0 due to further regressions in formatting empty elements (Matt Westcott)
+
+
 2.2 (10.08.2018)
 ~~~~~~~~~~~~~~~~
 

docs/releases/2.2.1.rst

@@ -0,0 +1,16 @@
+===========================
+Wagtail 2.2.1 release notes
+===========================
+
+.. contents::
+    :local:
+    :depth: 1
+
+
+What's new
+==========
+
+Bug fixes
+~~~~~~~~~
+
+ * Pin Beautiful Soup to 4.6.0 due to further regressions in formatting empty elements (Matt Westcott)

docs/releases/index.rst

@@ -6,6 +6,7 @@ Release notes
 
    upgrading
    2.3
+   2.2.1
    2.2
    2.1.3
    2.1.2