In doc/radosgw/layout.rst, 'ReST' is not spelled properly, so we change it to 'REST'.
Signed-off-by: wangyingbin <wangyingbin@inspur.com>
Object Lookup Path
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-When accessing objects, ReST APIs come to RGW with three parameters:
+When accessing objects, REST APIs come to RGW with three parameters:
account information (access key in S3 or account name in Swift),
bucket or container name, and object name (or key). At present, RGW only
uses account information to find out the user ID and for access control.