According to the ISO/IEC 27001:2022 standard, the organization should establish, implement and maintain a process to manage changes that affect the information security management system (ISMS) and to continually improve the suitability, adequacy and effectiveness of the ISMS (section 8.1.3 and 10.2). The standard also states that the organization should update the documented information of the ISMS as necessary to reflect the changes and the results of the improvement process (section 8.1.3.2 and 10.2.2). Therefore, the update of documented information supports the continual improvement of the ISMS by ensuring that the ISMS is aligned with the current and future needs and expectations of the organization and its interested parties.
Reference:
ISO/IEC 27001:2022, Information security, cybersecurity and privacy protection - Information security management systems - Requirements1 ISO/IEC 27001 Lead Implementer Info Kit Continual Improvement For ISO 27001 Requirement 10.22