Update README.md

Author: algovoid

docs/README.md

@@ -9,7 +9,7 @@ of Y = NOT(A . B . C . D . E . F . G . H)  in positive logic.
 
 ## Truth Table
 |                                     INPUTS                                    |         |
-|-------------------------------------------------------------------------------|  OUTPUT |
+| ----------------------------------------------------------------------------- |  OUTPUT |
 | INPUT A | INPUT B | INPUT C | INPUT D | INPUT E | INPUT F | INPUT G | INPUT H |         |
 |---------|---------|---------|---------|---------|---------|---------|---------|---------|
 |    L    |    X    |    X    |    X    |    X    |    X    |    X    |    X    |    H    |