Fix TechDiary brand name capitalization in profile OG image

Agent-Logs-Url: https://github.com/techdiary-dev/techdiary.dev/sessions/cdc0e779-fb92-4eda-9b72-735d6256f052

Co-authored-by: kingRayhan <7611746+kingRayhan@users.noreply.github.com>

Author: Copilot

src/app/[username]/(profile-page)/opengraph-image.tsx

@@ -153,7 +153,7 @@ export default async function Image(options: ProfilePageProps) {
               src={(await getFileLocation("logo-lg.png")) as any}
               alt="logo"
             />
-            <p style={{ fontSize: 28 }}>Techdiary</p>
+            <p style={{ fontSize: 28 }}>TechDiary</p>
           </div>
         </div>
       </div>