Park map: add impulse to the landmark labels

Co-Authored-By: Claude Opus 4.8 <[email protected]>

src/layouts/Base.astro

@@ -404,6 +404,7 @@ const pageUrl = new URL(Astro.url.pathname, Astro.site);
           // these just give bearings against the satellite imagery.
           const LANDMARKS = [
             'phoenix',
+            'impulse',
             'twister',
             'sklooosh',
             'haunted mansion',