fix(www): add canonical tag to pages/features/%5Bslug%5D.tsx

apps/www/pages/features/[slug].tsx

@@ -69,6 +69,7 @@ const FeaturePage: React.FC<FeaturePageProps> = ({ feature, prevFeature, nextFea
       <NextSeo
         title={meta.title}
         description={meta.description}
+        canonical={meta.url}
         openGraph={{
           title: meta.title,
           description: meta.description,