Update staff application close date to 2025-10-26 to match open period

backend/src/main/java/com/alttd/altitudeweb/controllers/forms/ApplicationController.java

@@ -38,7 +38,7 @@ public class ApplicationController implements ApplicationsApi {
     private final StaffApplicationDiscord staffApplicationDiscord;
 
     private final Instant open = Instant.parse("2025-10-18T00:00:00Z");
-    private final Instant close = Instant.parse("2020-10-26T00:00:00Z");
+    private final Instant close = Instant.parse("2025-10-26T00:00:00Z");
 
     @Override
     public ResponseEntity<Boolean> getStaffApplicationsIsOpen() {