seo: switch Schema.org Organization sameAs to github.com/Sharp-API

Repo now lives under the Sharp-API org alongside the SDKs
(sharpapi-python, sharpapi-ts). Pointing sameAs at Sharp-API gives
search engines a single canonical GitHub presence to associate with
the brand.

The Mlaz-code default in upstream-notify.yml stays — that points at
the dispatching product repos, which haven't moved.

Author: Mlaz-code

components/StructuredData.tsx

@@ -31,7 +31,7 @@ export function SiteStructuredData() {
           'url': MAIN_URL,
           'logo': `${MAIN_URL}/logo.svg`,
           'sameAs': [
-            'https://github.com/Mlaz-code',
+            'https://github.com/Sharp-API',
           ],
         })}
       />