op-build v2.2 release notes

Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
diff --git a/doc/release-notes/index.rst b/doc/release-notes/index.rst
index d5daa5c..cce6e1c 100644
--- a/doc/release-notes/index.rst
+++ b/doc/release-notes/index.rst
@@ -63,3 +63,5 @@
 
    v2.2-rc1
    v2.2-rc2
+   v2.2
+