Little confused about B3MultiFormat key name spell

[Liubey]

According to the description in the protocol https://github.com/openzipkin/b3-propagation, there does not seem to be any specification around letter case for those keys.

However, based on experience, the opentelemetry java sdk / npm sdk and former opentracing (jaeger) have implemented them in a case-sensitive way.

This brings about some issues around lack of consistency, meaning additional work is needed to unify things.

I'd like to ask if anyone has any suggestions or experience regarding this?
Or if possible, can I try changing them into a capitalized form similar to these SDKs?

Please let me know if I have accurately conveyed the key points you wanted to get across or if any part needs clarification or improvement. I'm happy to incorporate any feedback to refine the translation.