[FLINK-17939][docs-zh] Translate "Python Table API Installation" page into Chinese

[wuchong]

What is the purpose of the change

Translate "Python Table API Installation" page into Chinese.

The page url is https://ci.apache.org/projects/flink/flink-docs-master/zh/dev/table/python/installation.html

The markdown file is located in flink/docs/dev/table/python/installation.zh.md

Brief change log

• translate flink/docs/dev/table/python/installation.zh.md.

Verifying this change

This change is a trivial rework / code cleanup without any test coverage.

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): no
• The public API, i.e., is any changed class annotated with @Public(Evolving): no
• The serializers: no
• The runtime per-record code paths (performance sensitive): no
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: no
• The S3 file system connector: no

Documentation

• Does this pull request introduce a new feature? no
• If yes, how is the feature documented? no

[wuchong]

Note should be translated.

[flinkbot]

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Automated Checks

Last check on commit 3a30adb (Fri Oct 16 10:55:52 UTC 2020)

✅no warnings

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Review Progress

• ❓ 1. The [description] looks good.
• ❓ 2. There is [consensus] that the contribution should go into to Flink.
• ❓ 3. Needs [attention] from.
• ❓ 4. The change fits into the overall [architecture].
• ❓ 5. Overall code [quality] is good.

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[wuchong]

LGTM.