fix: update about page language count from 5 to 31

The about page 'By the Numbers' section was still showing '5' for the
language count. Updated to '31' to match the i18n system's 31-language
support.

Note: live server may need Apache cache flush to serve the updated page.

src/app/about/page.tsx

@@ -143,7 +143,7 @@ export default function AboutPage() {
                 { value: "93+", label: "App Templates" },
                 { value: "1770+", label: "Test Cases" },
                 { value: "260+", label: "API Endpoints" },
-                { value: "5", label: "Languages" },
+                { value: "31", label: "Languages" },
               ].map((stat) => (
                 <div key={stat.label} className="text-center">
                   <div className="text-4xl font-bold text-brand-400 mb-2">