docs: fix shell command syntax for CORS example (envoyproxy#7222)

* docs: fix shell command syntax for CORS example

Signed-off-by: Dean Coakley <[email protected]>

* docs: fix shell command for v1.5 cors example

Signed-off-by: Dean Coakley <[email protected]>

---------

Signed-off-by: Dean Coakley <[email protected]>

Author: Dean-Coakley

site/content/en/latest/tasks/security/cors.md

@@ -233,7 +233,6 @@ You won't see any CORS headers in the response, indicating that the request from
 If you try to send a request from `http://www.foo.com:8080`, you should also see similar response because the port number
 `8080` is not included in the allowed origins.
 
-```shell
 ```shell
 curl -H "Origin: http://www.foo.com:8080" \
   -H "Host: www.example.com" \

site/content/en/v1.5/tasks/security/cors.md

@@ -233,7 +233,6 @@ You won't see any CORS headers in the response, indicating that the request from
 If you try to send a request from `http://www.foo.com:8080`, you should also see similar response because the port number
 `8080` is not included in the allowed origins.
 
-```shell
 ```shell
 curl -H "Origin: http://www.foo.com:8080" \
   -H "Host: www.example.com" \