Update header text

Author: shravanngoswamii

_includes/header.qmd

@@ -3,7 +3,7 @@
   <div class="hero-content text-center">
     <img src="./assets/logo/turing-logo-light.svg" alt="Turing Logo" class="hero-logo hero-logo-light">
     <img src="./assets/logo/turing-logo-dark.svg" alt="Turing Logo" class="hero-logo hero-logo-dark">
-    <p class="hero-subtitle">A powerful and flexible probabilistic programming language for Julia.</p>
+    <p class="hero-subtitle">Bayesian inference with probabilistic programming</p>
     <div class="hero-cta-buttons">
       <a href="https://turinglang.org/docs/getting-started/" class="button btn-lg button--fill">Get Started</a>
       <a href="https://github.com/TuringLang/Turing.jl" class="button btn-lg">View on GitHub</a>