Example targets in shopify extension toml file are incorrect.

[ianjosephwilson]

Commented out targets in https://github.com/Shopify/extensions-templates/blob/main/admin-link/shopify.extension.toml.liquid#L29 did not seem to get updated with ad21711

Ie. admin.order-index.selection.action.link should be admin.order-index.selection-action.link

Maybe it would be better to just remove them and link to documentation for up to date target list?