Mention PDF report export in README overview

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: cps13

Examples/solar-power-app/README.md

@@ -13,6 +13,7 @@ This app lets you enter any street address, view the rooftop on a satellite map,
 - **Temperature derating** using NOCT (Nominal Operating Cell Temperature) model
 - **Clearness index** from NASA POWER monthly averages
 - **Panel tilt optimization** for maximum annual yield
+- **PDF report export** with site summary and energy analysis
 
 ## Quick Start