docs: items can be shared as links, not have them

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs/links.md

@@ -1,9 +1,10 @@
 # Links
 
-Every subscription, workspace, vault, scope, repo, file and secret has a
-`lazysecrets://` link. Share one in chat or a ticket, and whoever opens it
-lands on that item, reading it with their own account and permissions:
-links carry names, never values.
+Subscriptions, workspaces, vaults, scopes, repos, files and secrets can
+be shared as a `lazysecrets://` link, in chat or a ticket. Whoever opens
+it lands on that item, reading it with their own account and
+permissions: the link names the item, never its value. Env files can
+also be [shared encrypted](#sharing-env-files), in the link itself.
 
 ```
 lazysecrets://azure/kv-app-prod.vault.azure.net                              vault