Update readme

Author: fjb2020

README.md

@@ -17,12 +17,12 @@ A Lightroom Classic plugin which publishes images to a Piwigo host via the Piwig
     * date_creation from LrC Date Time Original
     * name (title) - default from LrC Title,
     * comment (description) - default from LrC Caption,
-    * tokenised strings may be used instead for image name (title) and comment (description) - tokens idenfified by {{token}} will be substituted for image specific values on export. All metadata documented in photo:getFormattedMetadata (see https://archive.stecman.co.nz/files/docs/lightroom-sdk/API-Reference/modules/LrPhoto.html#photo:getFormattedMetadata) and photo:getRawMetadata (see https://archive.stecman.co.nz/files/docs/lightroom-sdk/API-Reference/modules/LrPhoto.html#photo:getRawMetadata) from the Lightroom Classic SDK are supported - for example: title, caption, headline, altTextAccessibility, extDescrAccessibility, copyName are supported.
+    * tokenised strings may be used instead for image name (title) and comment (description) - tokens idenfified by {{token}} will be substituted for image specific values on export. All metadata documented in photo:getFormattedMetadata (see https://archive.stecman.co.nz/files/docs/lightroom-sdk/API-Reference/modules/LrPhoto.html#photo:getFormattedMetadata) and photo:getRawMetadata (see https://archive.stecman.co.nz/files/docs/lightroom-sdk/API-Reference/modules/LrPhoto.html#photo:getRawMetadata) from the Lightroom Classic SDK are supported as tokens - for example: title, caption, headline, altTextAccessibility, extDescrAccessibility, copyName will substitute the corresponding values from the image.
   * Keywords are handled as follows: 
     * The Include on Export attribute set on individual keywords is respected.
     * Flags for Include Full Keyword Hierarchy and Include Keyword Synonyms can be set in the LrC Publishing Manager (the equivalent flags set in the LrC Keyword Tag editor are not visible to plugins so can't be used)
     * New keywords are created if not present in the Piwigo keywords list
-    * Tag comparison between LrC and Piwigo is not case sensitive - so for example 'This Is A Keyword' and 'this is a keyword' are treated as the same when sending keywords to Piwigo.
+    * Keyword comparison between LrC and Piwigo is not case sensitive as Piwigo effectively does case-folding and accent-folding to enable keyword based URLs to work - so for example 'This Is A Keyword' and 'this is a keyword' are treated as the same when sending keywords to Piwigo.
   * GPS location data is only sent via exif so users of the OpenStreetMap plugin need to ensure that location info is included in the Metadata settings on the LrC Publishing Manager
 * The plugin maintains a custom metadata set, Piwigo Publisher Metadata, with details of the most recent publishing activity for an image. NOTE - only images published using release 20251224.16 or later of this plugin will have this metadata.
 * Changes to images which trigger a re-publish will overwrite the previously published Piwigo image.