Add note to share creation

Signed-off-by: Julius Härtl <jus@bitgrid.net>

developer_manual/client_apis/OCS/ocs-share-api.rst

@@ -83,6 +83,7 @@ Share a file/folder with a user/group or as public link.
   16 = share; 31 = all (default: 31, for public shares: 1)
 * POST Arguments: expireDate - (string) set a expire date for public link
   shares. This argument expects a well formatted date string, e.g. 'YYYY-MM-DD'
+* POST Arguments: note - (string) Adds a note for the share recipient.
 * Mandatory fields: shareType, path and shareWith for shareType 0 or 1.
 
 * Result: XML containing the share ID (int) of the newly created share