fix: add missing translation

public/language/en-GB/admin/dashboard.json

@@ -83,6 +83,7 @@
 	"back-to-dashboard": "Back to Dashboard",
 	"details.no-users": "No users have joined within the selected timeframe",
 	"details.no-topics": "No topics have been posted within the selected timeframe",
+	"details.no-searches": "No searches have been made yet",
 	"details.no-logins": "No logins have been recorded within the selected timeframe",
 	"details.logins-static": "NodeBB only saves session data for %1 days, and so this table below will only show the most recently active sessions",
 	"details.logins-login-time": "Login Time"