Singular: The following plugin needs to be updated to its latest version to ensure maximum compatibility with this theme: %1$s.The following plugin needs to be updated to its latest version to ensure maximum compatibility with this theme: %1$s.
Plural: The following plugins need to be updated to their latest version to ensure maximum compatibility with this theme: %1$s.The following plugins need to be updated to their latest version to ensure maximum compatibility with this theme: %1$s.
This plural form is used for numbers like: 1, 101, 201