[Bug] Collection option for time zone input doesn't limit the selection

## Environment

- Ruby **3.2.2**
- Rails **7.0**
- Simple Form **5.3.1**

## Code sample

``` ruby
f.input :time_zone, as: :time_zone, 
  collection: ["London", "Berlin"].map { ActiveSupport::TimeZone[_1] }, 
  include_blank: false
```


## Current behavior

Renders all time zones as options

## Expected behavior

Renders only specified time zones selection.
