No functional changes. This release confirms the v1.3.0 auto-update
mechanism actually works end-to-end on a live site: v1.3.0 was
manually installed once, and this release should now appear as a
normal "Update available" notice in wp-admin with zero further
manual steps.
Also bumps "Tested up to" to 6.8, clearing WordPress's cosmetic
"not tested with your current version" advisory (the plugin only
uses long-stable core APIs with no version-specific behavior).