fix(site): Refine homepage tagline

Replace the implementation-focused tagline with a concise statement of personal agency and responsibility toward the future shaped by technology.

Author: cidxb

_config.yml

@@ -29,7 +29,7 @@ description:           >
   tactile perception, dexterous manipulation, real-robot learning, and agent runtimes.
 
 # A shorter description for the sidebar.
-tagline:               Embodied intelligence, built for the real world
+tagline:               Building the future we choose, not the one we fear.
 
 # A list of keywords for your blog
 keywords: