Show next maintenance date in splash screen footer

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jayhesselberth

scripts/bodhi-splash

@@ -328,7 +328,9 @@ __bodhi_splash_main() {
     _bs_mid
     _bs_contact_info
     _bs_mid
-    _bs_row "${_dim}Maintenance is performed the last Thursday of every month.${_rst}"
+    local _next_maint_str
+    _next_maint_str=$(date -d "@$(_bs_get_next_maintenance)" "+%B %-d")
+    _bs_row "${_dim}Cluster unavailable the last Thursday of every month (next: ${_next_maint_str}).${_rst}"
     _bs_bot
 
     printf '\n'