Leave comment in redirects file.

Slack invite redirect is managed from Cloudflare UI.

Author: Relequestual

public/_redirects

@@ -21,8 +21,9 @@
 /latest/release-notes /draft/2020-12/release-notes
 /implementations /tools 301
 /obsolete-implementations /tools?showObsolete=true 301
-/slack https://join.slack.com/t/json-schema/shared_invite/zt-3ktcs18gk-ElYFaGDSOv68OJMf3H4vXg 301
-/slack-redirect https://join.slack.com/t/json-schema/shared_invite/zt-3ktcs18gk-ElYFaGDSOv68OJMf3H4vXg 301
+# Slack redirect to invite URL is handled by Cloudflare via UI. Not sure why. Maybe to avoid having to wait for a build and deploy.
+# /slack https://join.slack.com/t/json-schema/shared_invite/zt-3ktcs18gk-ElYFaGDSOv68OJMf3H4vXg 301
+/slack-redirect /slack 301
 /understanding-json-schema /understanding-json-schema/reference 301
 /understanding-json-schema/conventions /understanding-json-schema/reference 301
 /understanding-json-schema/reference/_index.md /understanding-json-schema/reference 301