When output with php the block had correct accessibility on
the frontend but in the editor or when rendered as block
the correct aria label was missing because of misspelled
aria-label attribute.
Also fixed wrong value type provided for tabIndex in editor
while at it.
* Add links to single routes in main index woocommerce/woocommerce-blocks#4473
* Footer
* Feedback template
* Remove footer from existing MD files
* Add doc footer script
* Apply script to all docs
* Fix examples