fix Timezone default value

src/Entity/Organization/Parameters.php

@@ -150,7 +150,7 @@ class Parameters
     private ?File $qrCode = null;
 
     #[ORM\Column(length: 255, enumType: TimeZoneEnum::class, options: ['default' => TimeZoneEnum::EUROPE_PARIS])]
-    private ?TimeZoneEnum $timezone = null;
+    private ?TimeZoneEnum $timezone = TimeZoneEnum::EUROPE_PARIS;
 
     #[ORM\Column(length: 255, nullable: false, enumType: PeriodicityEnum::class, options: ['default' => PeriodicityEnum::ANNUAL])]
     private PeriodicityEnum $educationPeriodicity = PeriodicityEnum::ANNUAL;