Add myself to acknowledgements of hyperschema

Denis Laxalde · Denis Laxalde · commit 627801ebc460 · 2017-04-06T08:32:25.000+02:00
diff --git a/jsonschema-hyperschema.xml b/jsonschema-hyperschema.xml
@@ -993,7 +993,8 @@ GET /foo/
                 Brad Bowman,
                 Gowry Sankar,
                 Donald Pipowitch,
-                and Dave Finlay
+                Dave Finlay,
+                and Denis Laxalde
                 for their submissions and patches to the document.
             </t>
         </section>
