fix: use the same amount of precision as before on transactions

Values in bytes are stored in this column and need more precision.

database/migrations/2024_02_19_102057_alter_floats_to_decimal.php

@@ -24,7 +24,7 @@ public function up(): void
         });
 
         Schema::table('bon_transactions', function (Blueprint $table): void {
-            $table->decimal('cost', 12, 2)->default(0)->change();
+            $table->decimal('cost', 22, 2)->default(0)->change();
         });
 
         DB::statement('ALTER TABLE users ADD CONSTRAINT check_users_seedbonus CHECK (seedbonus >= 0);');