Land rapid7#7884, move cisco_webex_ext to the browser directory

Author: wchen-r7

documentation/modules/exploit/windows/misc/cisco_webex_ext.md renamed to documentation/modules/exploit/windows/browser/cisco_webex_ext.md

@@ -13,7 +13,7 @@ Cisco WebEx Chrome Extension 1.0.1 is known to be affected.
 ## Verification Steps
 
 1. Start msfconsole
-2. Do: ```use exploit/windows/misc/cisco_webex_ext```
+2. Do: ```use exploit/windows/browser/cisco_webex_ext```
 3. Do: ```set SRVHOST [IP ADDRESS]```
 4. Do: ```set SRVPORT [PAYLOAD NAME]```
 5. Do: ```set URIPATH [ARBITRARY URI]```
@@ -23,7 +23,7 @@ Cisco WebEx Chrome Extension 1.0.1 is known to be affected.
 ## Demo
 
 ```
-msf > use exploits/windows/misc/cisco_webex_ext
+msf > use exploits/windows/browser/cisco_webex_ext
 msf exploit(cisco_webex_ext) > set srvhost 10.6.0.151
 srvhost => 10.6.0.151
 msf exploit(cisco_webex_ext) > set srvport 4567