0.9.0 zstd codec depends on cramjam but missing in documentation

[iamwrm]

Describe the bug

Hi. I found zstd compression support needs cramjam

https://github.com/aio-libs/aiokafka/blob/881851783673e927591ba274a7703c9b52d387ac/aiokafka/codec.py#L10C19-L10C19

But the doc still says pip install aiokafka[zstd], while 0.9.0 doesn't even have this option.

aiokafka/docs/index.rst

Line 127 in 8818517

pip install 'aiokafka[zstd]'

Environment (please complete the following information):

• aiokafka version (python -c "import aiokafka; print(aiokafka.__version__)"): 0.9.0
• Kafka Broker version (kafka-topics.sh --version): redpanda
• Other information (Confluent Cloud version, etc.):

If this bug does confirm to exist, I would love to open a PR to fix the doc.

[ods]

Should be fixed in 0.10.0