Add name to contributor list

Author: hmedina

AUTHORS.rst

@@ -58,6 +58,7 @@ Contributors
 * Filip Vavera -- napoleon todo directive
 * Glenn Matthews -- python domain signature improvements
 * Gregory Szorc -- performance improvements
+* Héctor Medina Abarca -- per-code-block highlighting style overrides
 * Henrique Bastos -- SVG support for graphviz extension
 * Hernan Grecco -- search improvements
 * Hong Xu -- svg support in imgmath extension and various bug fixes

CHANGES.rst

@@ -31,7 +31,7 @@ Features added
   basis via new options (:rst:dir:`code-block:style-light` and 
   :rst:dir:`code-block:style-dark`) for the :rst:dir:`code-block`,
   :rst:dir:`sourcecode`, :rst:dir:`literalinclude` and :rst:dir:`code`.
-  Patch by Héctor Medina.
+  Patch by Héctor Medina Abarca.
 
 Bugs fixed
 ----------