[doc] Small correction to the debug interface signals table at doc/03_reference/debug.rst (#269)

Author: cairo-caplan

doc/03_reference/debug.rst

@@ -24,9 +24,9 @@ Interface
 | ``debug_req_i``                  | input               | Request to enter Debug Mode                                                          |
 +----------------------------------+---------------------+--------------------------------------------------------------------------------------+
 | ``dm_halt_addr_i``               | input               | Address to jump to when entering Debug Mode (default 0x1A110800)                     |
-+----------------------------------+---------------------+------------+-------------------------------------------------------------------------+
++----------------------------------+---------------------+--------------------------------------------------------------------------------------+
 | ``dm_exception_addr_i``          | input               | Address to jump to when an exception occurs while in Debug Mode (default 0x1A110808) |
-+----------------------------------+---------------------+------------+-------------------------------------------------------------------------+
++----------------------------------+---------------------+--------------------------------------------------------------------------------------+
 
 ``debug_req_i`` is the "debug interrupt", issued by the debug module when the core should enter Debug Mode.