brighten ascii logo on hover

as was originally intended. why is fg "de-bolded" by pens?

docs/changelog.txt

@@ -60,6 +60,7 @@ Template for new versions:
 
 ## Misc Improvements
 - `dig`: `digtype` command now has options to choose between designating only visible tiles or hidden tiles, as well as "auto" dig mode. Z-level options adjusted to allow choosing z-levels above, below, or the same as the cursor.
+- `hotkeys`: make the DFHack logo brighten on hover in ascii mode to indicate that it is clickable
 
 ## Documentation
 

plugins/lua/hotkeys.lua

@@ -65,6 +65,7 @@ function HotspotMenuWidget:init()
             tile=function() return dfhack.textures.getTexposByHandle(logo_hovered_textures[idx]) end,
             ch=ch,
             fg=COLOR_WHITE,
+            bold=true,
         }
     end
     local function get_tile_token(idx, ch)