updated DevProg text

Author: Zach Lasiuk

themes/arm-design-system-hugo-theme/layouts/partials/learning-paths/next-steps.html

@@ -255,7 +255,7 @@ <h4>Talk with Arm Experts</h4>
             -->
 
                 <h4>Join Developer Program</h4>
-                <p>Sign up now!</p>
+                <p>Join the Arm Developer Program to share ideas, ask questions, and explore solutions with the support of the developer community.</p>
 
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