[doc] Fix table

Author: mikessh

doc/cdrblast.rst

@@ -64,7 +64,7 @@ structure:
 | S1          | human     | TRB     | unpaired             | -      | 25,30                    |
 +-------------+-----------+---------+----------------------+--------+--------------------------+
 | S2          | mouse     | TRB,TRA | paired               | 0:1    | 20,25                    |
-+-------------+-----------+--------=+----------------------+--------+--------------------------+
++-------------+-----------+---------+----------------------+--------+--------------------------+
 
 See section below for more details.