Social: render JetpackFooter on all sites (#48183)

SocialAdminPage gated showFooter to isJetpackSelfHostedSite(), hiding
the JetpackFooter on WP.com (Simple and Atomic). Every other Jetpack
admin page (Newsletter, Search, Backup, Protect, VideoPress, Boost,
Network Admin) renders the footer unconditionally, so Social was the
lone exception. Drop the override so the default (true) applies.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: CGastrell

projects/packages/publicize/_inc/components/admin-page/index.tsx

@@ -92,7 +92,6 @@ export const SocialAdminPage = () => {
 			title={ 'Social' /** "Social" is a product name, do not translate. */ }
 			subTitle={ subTitle }
 			actions={ licenseAction }
-			showFooter={ isJetpackSite }
 		>
 			<GlobalNotices />
 			{ isJetpackSite && ! hasSocialPaidFeatures() && showPricingPage && ! pricingPageDismissed ? (

projects/packages/publicize/changelog/fix-social-admin-page-restore-footer

@@ -0,0 +1,4 @@
+Significance: patch
+Type: fixed
+
+Social admin page: render the JetpackFooter unconditionally for parity with every other Jetpack admin page (Newsletter, Search, Backup, Protect, VideoPress, Boost, Network Admin).