[Issue #2600] fix availability zone count variable (#2807)

## Summary

Contributes to #2600

### Time to review: __0.1 mins__

## Context for reviewers


https://github.com/HHS/simpler-grants-gov/actions/runs/11802929736/job/32879723263#step:5:143

infra/api/app-config/env-config/outputs.tf

@@ -1,11 +1,11 @@
 output "search_config" {
   value = var.has_search ? {
-    instance_type                  = var.search_data_instance_type
-    instance_count                 = var.search_data_instance_count
-    dedicated_master_type          = var.search_master_instance_type
-    engine_version                 = var.search_engine_version
-    volume_size                    = var.search_data_volume_size
-    search_availability_zone_count = var.search_availability_zone_count
+    instance_type           = var.search_data_instance_type
+    instance_count          = var.search_data_instance_count
+    dedicated_master_type   = var.search_master_instance_type
+    engine_version          = var.search_engine_version
+    volume_size             = var.search_data_volume_size
+    availability_zone_count = var.search_availability_zone_count
   } : null
 }