Fix think-o.
Merge topic 'improve-INTERFACE-property-docs' into next

53d0067a Fix think-o.
Help: Fix typo in genex in documentation.
Help: Warn that paths should not be used in INTERFACE_ build properties.
Merge topic 'improve-INTERFACE-property-docs' into next

3c36bb3a Help: Warn that paths should not be used in INTERFACE_ build properties.
96691d12 Help: Fix typo in genex in documentation.