Update locales/en-US.json

Co-authored-by: Samantaz Fox <coding@samantaz.fr>

locales/en-US.json

@@ -475,7 +475,7 @@
     "footer_support_section_header": "Support",
     "footer_contact_link": "Contact instance maintainer",
     "footer_report_bug_link": "Report a bug",
-    "footer_faq_link": "FAQs",
+    "footer_faq_link": "FAQ",
     "footer_legal_section_header": "Legal",
     "footer_licences_link": "Licences",
     "footer_privacy_policy_link": "Privacy",