For the "View Build" link in notification e-mails, forward slashes for folders in Blue Ocean job URL paths are encoded to a double forward slash instead of a single forward slash.

Notification webhooks
URL: https://outlook.office.com/webhook/e280b...

• Expected: should be forward slash ( / ): %2F
  https://hostname/jenkins/blue/organizations/jenkins/foldername%2Ffoldername%2Ffoldername%2Ffoldername/detail/projectname/2/pipeline
• Actual: double forward slash ( // ): %252F
  https://hostname/jenkins/blue/organizations/jenkins/foldername%252Ffoldername%252Ffoldername%252Ffoldername/detail/projectname/2/pipeline

Related issue: JENKINS-53261