Added maintenance window for prod postgress

[VenkataChalla554]

Terraform Plan :

` # module.postgres.data.azurerm_monitor_diagnostic_categories.main[0] will be read during apply

(depends on a resource or a module with changes pending)

<= data "azurerm_monitor_diagnostic_categories" "main" {
+ id = (known after apply)
+ log_category_groups = (known after apply)
+ log_category_types = (known after apply)
+ logs = (known after apply)
+ metrics = (known after apply)
+ resource_id = "/subscriptions/3c033a0c-7a1c-4653-93cb-0f2a9f57a391/resourceGroups/s189p01-gitapi-pd-rg/providers/Microsoft.DBforPostgreSQL/flexibleServers/s189p01-gitapi-pd-pg"
}

module.postgres.azurerm_postgresql_flexible_server.main[0] will be updated in-place

~ resource "azurerm_postgresql_flexible_server" "main" {
id = "/subscriptions/3c033a0c-7a1c-4653-93cb-0f2a9f57a391/resourceGroups/s189p01-gitapi-pd-rg/providers/Microsoft.DBforPostgreSQL/flexibleServers/s189p01-gitapi-pd-pg"
name = "s189p01-gitapi-pd-pg"
~ public_network_access_enabled = false -> true
tags = {
"Environment" = "Prod"
"Product" = "Get into teaching website"
"Service Offering" = ""
}
# (15 unchanged attributes hidden)

  + maintenance_window {
      + day_of_week  = 0
      + start_hour   = 3
      + start_minute = 0
    }

    # (2 unchanged blocks hidden)
}

module.statuscake[0].statuscake_uptime_check.main["https://getintoteachingapi-production.teacherservices.cloud/healthcheck"] will be updated in-place

~ resource "statuscake_uptime_check" "main" {
~ contact_groups = [
- "282453",
# (1 unchanged element hidden)
]
id = "6974683"
name = "https://getintoteachingapi-production.teacherservices.cloud/healthcheck"
tags = []
# (6 unchanged attributes hidden)

    # (2 unchanged blocks hidden)
}

Plan: 0 to add, 2 to change, 0 to destroy.`