Add or fix See Also links between scripts

scripts/smb-webexec-exploit.nse

@@ -36,6 +36,8 @@ References:
 -- | smb-vuln-webexec:
 -- |   Vulnerable: WebExService could be accessed remotely as the given user!
 -- |_  ...and successfully started console command: net user test test /add
+--
+-- @see smb-vuln-webexec.nse
 
 author = "Ron Bowes"
 license = "Same as Nmap--See https://nmap.org/book/man-legal.html"