fix bill.category_id, not unsigned because of hardcoded reimb cat wit…

…h id -11

Signed-off-by: Julien Veyssier <[email protected]>

lib/Migration/Version030000Date20240911230019.php

@@ -51,7 +51,7 @@ public function changeSchema(IOutput $output, Closure $schemaClosure, array $opt
 				$table->addColumn('category_id', Types::BIGINT, [
 					'notnull' => false,
 					'default' => null,
-					'unsigned' => true,
+					'unsigned' => false,
 				]);
 				$schemaChanged = true;
 			}