Add env variable docs (#2440)

* - add env variable docs

* - danger.js rule

* - fix value

* Fix Danger CI setup

* Add token in CI

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Co-authored-by: Félix Malfait <felix.malfait@gmail.com>

docs/docs/others/telemetry.mdx

@@ -12,5 +12,5 @@ Twenty does not use cookies for telemetry or collect email addresses, names, pho
 # Opting-out of telemetry
 To disable telemetry in your workspace, add the following line to your `server/.env` file:
 ```
-IS_TELEMETRY_ENABLED=false
+TELEMETRY_ANONYMIZATION_ENABLED=false
 ```