Merge pull request #375 from knockout/docs/landing-version-dynamic

docs(tko.io): make landing version pill dynamic

Author: brianmhunt

tko.io/src/content/docs/index.mdx

@@ -4,8 +4,9 @@ description: Modern Knockout — reactive data binding and UI templating with ze
 ---
 
 import { Tabs, TabItem } from '@astrojs/starlight/components';
+import pkg from '../../../../builds/knockout/package.json';
 
-<a class="landing-version" href="https://github.com/knockout/tko/releases">TKO v4.0.1 is here &rarr;</a>
+<a class="landing-version" href="https://github.com/knockout/tko/releases">TKO v{pkg.version} is here &rarr;</a>
 
 <div class="landing-hero">
   <h2>TKO</h2>