transparent-gateway-details.rst: Fix Radio-Co Processor firmware docker build

Adds sudo to docker commands, without them "permission denied" error message might show up.

Closes eclipse/oniro-core/docs#118 (closed)

Signed-off-by: Grzegorz Gwóźdź grzegorz.gwozdz@huawei.com

transparent-gateway-details.rst

@@ -25,9 +25,9 @@ The current manual process is quite intricated, but expect vast improvements in
    $ docker pull openthread/environment:latest
    $ docker run -it --rm openthread/environment bash
 
-   .. note::
+.. note::
 
-      You may receive an error message `permisssion denied`. You can start both 
+      You may receive an error message `permisssion denied`. You can run both 
       of the commands with `sudo`.
       If you don’t want to preface the `docker` command with `sudo`, create a Unix group
       called `docker` and add users to it. When the Docker daemon starts, it creates a