opentelemetry-instrumentation-confluent-kafka: Increase confluent-kafka upper bound to support newer versions

[manuel-lang]

Description

opentelemetry-instrumentation-confluent-kafka had an upper bound for confluent-kafka for the version 2.11.0. This version is not uptodate anymore, so the PR suggests to bump the upper bound to the most recent version.

Fixes #3897

Type of change

Please delete options that are not relevant.

• [x] New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• [x] Followed Contributing.md and running tox didn't show any issues related to these changes.
• [x] tox -e py39-test-instrumentation-confluent-kafka
• [x] tox -e py310-test-instrumentation-confluent-kafka
• [x] tox -e py311-test-instrumentation-confluent-kafka
• [x] tox -e py312-test-instrumentation-confluent-kafka
• [x] tox -e py313-test-instrumentation-confluent-kafka
• [x] tox -e py314-test-instrumentation-confluent-kafka

Does This PR Require a Core Repo Change?

• [x] No.

Checklist:

See contributing.md for styleguide, changelog guidelines, and more.

• [x] Followed the style guidelines of this project
• [x] Changelogs have been updated
• [x] Documentation has been updated

[xrmx]

Please run tox -e precommit and tox -e generate and update the updated files.

[manuel-lang]

Thank you, @xrmx. Updated accordingly.

[xrmx]

@manuel-lang You don't need to update the branch, we'll take care of that when merging

[manuel-lang]

@manuel-lang You don't need to update the branch, we'll take care of that when merging

Perfect, thanks a lot! :)