### What changes were proposed in this pull request?
1. Document adds Flink 1.16 support including `README.md`, `deploy.md`.
2. Update description of `celeborn.client.shuffle.compression.codec` to change the supported Flink version for ZSTD.
### Why are the changes needed?
#2619 has supported Flink 1.16, which should update the document for the support. Meanwhile, since Flink version 1.16, zstd is supported for Flink shuffle client.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
No.
Closes#2904 from SteNicholas/CELEBORN-1504.
Authored-by: SteNicholas <programgeek@163.com>
Signed-off-by: mingji <fengmingxiao.fmx@alibaba-inc.com>
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