update docs to reference new secrets patterns (#59)

Docs update for atuinsh/atuin#2174

Author: drmorr0

src/content/docs/configuration/config.mdx

@@ -318,6 +318,7 @@ Defaults to true. This matches history against a set of default regex, and will
 4. Slack webhooks
 5. Stripe live/test keys
 6. Atuin login command
+7. Cloud environment variable patterns (`AWS_ACCESS_KEY_ID`, `AWS_SECRET_ACCESS_KEY`, `AZURE_STORAGE_CLASS_KEY`, `GOOGLE_SERVICE_ACCOUNT_KEY`)
 
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