chore(docs): update baggage tags config (#13577)

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---------

Co-authored-by: Rachel Yang <[email protected]>

Author: mabdinur

docs/configuration.rst

@@ -919,11 +919,9 @@ Other
       default: "user.id,account.id,session.id"
 
       description: |
-         A comma-separated list of baggage keys to be automatically attached as tags on spans.
-         For each key specified, if a corresponding baggage key is present and has a non-empty value,
-         the key-value pair will be added to the span's metadata using the key name formatted as ``baggage.<key>``.
-         If you want to turn off this feature, set the configuration value to an empty string.
-         When set to `*`, **all** baggage keys will be converted into span tags. Use with caution: this may unintentionally expose sensitive or internal data if not used intentionally.
+          A comma-separated list of baggage keys, sent via HTTP headers, to automatically tag as baggage.<key> on the local root span.
+          Only baggage extracted from incoming headers is supported. Baggage set via ``Context.set_baggage_item(..., ...)`` is not included. Keys must have non-empty values. 
+          Set to * to tag all baggage keys (use with caution to avoid exposing sensitive data). Set to an empty string to disable the feature.
 
       version_added: 
          v3.6.0: