Update laravel 11 app.php test template

[askdkc]

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[what-the-diff]

PR Summary

• Timezone Configuration Modification
  The way our system handles timezones has been changed. Previously, the system would get this setting from an "environment variable" (essentially a place where certain system-specific values are stored). Now, this value has been set to a fixed standard, which is 'UTC'. This means that the system will always operate based on the Coordinated Universal Time, helping to standardize our operations irrespective of the geographical location of our servers or users.