[POB-3907] Fix linting error

Co-authored-by: Chris Mitchell <[email protected]>

Author: GiovanniGo

xero-payroll-uk.yaml

@@ -7653,7 +7653,7 @@ components:
           type: string
           format: uuid
         isFixedTerm:
-          description:  describes whether the contract is fixed term (required if trying to create Fixed term contract)
+          description: describes whether the contract is fixed term (required if trying to create Fixed term contract)
           type: boolean
         fixedTermEndDate:
           description: The fixed term end date of the employee. Not required if isFixedTerm is false or not provided (required if trying to create Fixed term contract)