chore: hard deploy v2.9.6 in us-west-1-sec (#992)

Will land on [`us-west-1-sec`
cluster.](supabase/platform#33017)

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

Author: mentels

deploy/upgrade/prod.config

@@ -4,10 +4,10 @@
     {upgrade_to, "2.9.6"},
     % list() | [<<"all">>]
     {regions, [
-	    <<"ca-central-1">>
+	    <<"us-west-1-sec">>
             ]},
     % :soft | :hard
-    {type, soft}
+    {type, hard}
 ].
 % supavisor_soft_all-1_1.1.13_1.1.39
 % vi: ft=erlang