[mod] shortcut mods

searx/settings.yml

     engine : wikipedia
     number_of_results : 1
     paging : False
-    shortcut : wi
+    shortcut : wp
 
   - name : bing
     engine : bing
   - name : github
     engine : github
     categories : it
-    shortcut : gi
+    shortcut : gh
 
   - name : google
     engine : google