fix(bio): compute age in Life at heading from birth date at build time

src/content/bio/my-story.mdx

@@ -18,6 +18,9 @@ import wine from '../../assets/photos/wine.jpg';
 import modica from '../../assets/photos/modica.jpg';
 import meAmanda from '../../assets/photos/me-amanda.jpg';
 
+export const now = new Date();
+export const age = now.getFullYear() - 1988 - (now.getMonth() < 11 ? 1 : 0);
+
 ## Hello world!
 
 Hi! I’m Lorenzo Iovino.
@@ -167,7 +170,7 @@ For me, living here is a reminder: success is not only about projects and code.
   <em class="text-sm block mt-2">Modica view from my house</em>
 </div>
 
-## Life at 35
+## Life at {age}
 
 Today I’m a husband (to my wife Amanda) and a dad (to our little Leonardo).