Update frontend/encore/dev-server.rst (live reload title)

Co-authored-by: Ryan Weaver <[email protected]>

Author: ne0-cz

frontend/encore/dev-server.rst

@@ -128,7 +128,7 @@ your page. HMR works automatically with CSS (as long as you're using the
 ``dev-server`` and Encore 1.0 or higher) but only works with some JavaScript
 (like :doc:`Vue.js </frontend/encore/vuejs>`).
 
-Enabling live reload with HMR
+Live Reloading when changing PHP / Twig Files
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 To utilize the HMR superpower along with live reload for your PHP code and