docs: add creationdate to supported DAV properties table

Signed-off-by: Cristian Scheid <cristianscheid@gmail.com>

Author: cristianscheid

developer_manual/client_apis/WebDAV/search.rst

@@ -65,6 +65,8 @@ not all properties can be used for each operation.
 +----------------------------------------------+---------------------------------+------------+------------+----------+----------+
 | {DAV:}getlastmodified                        | Modified date                   | ✓          | ✓          | ✓        | Datetime |
 +----------------------------------------------+---------------------------------+------------+------------+----------+----------+
+| {DAV:}creationdate                           | Creation date                   | ✓          | ✓          | ✓        | Datetime |
++----------------------------------------------+---------------------------------+------------+------------+----------+----------+
 | {http://nextcloud.org/ns}upload_time         | Upload date                     | ✓          | ✓          | ✓        | Datetime |
 +----------------------------------------------+---------------------------------+------------+------------+----------+----------+
 | {http://owncloud.org/ns}size                 | File size or folder size        | ✓          | ✓          | ✓        | Integer  |