docs(core): fix Simplified Chinese README

[LearningPawn]

1. Corrected some wrong simplified Chinese characters like 時 -> 时, 裝 -> 装;
2. Corrected some wrong meaning, like 近 10 年 means In recent 10 years, but actually it is 10 years of in the source English README.md and the demo's dataset Trips data is from 2009 to 2019, 1.6 亿 means 160 million not 1.6 billion;
3. Corrected some wording that was not clear and coherent, and Removed single line breaks. A single line break will not generate a break but a space by Github markdown renderer, and make a whole chinese word split, just like 阅读 -> 阅 读, Reading -> Re ading;
4. Add official docs links about InfluxDB Line Protocol & PostgreSQL Wire Protocol;
5. Translate img tags' descriptions after alt=;
6. Change wrong html anchor link href='#contribute' -> href='#贡献' it works in my preview;
7. Update wrong png url from /.github/tsbs-results.png to /.github/readme-benchmark.png.

btw, during the editing README.zh-cn.md, I was confused about the sentence "...to correlate data from multiple sources using relational and time-series joins" in the source English README.md, Do you mean "...to correlate data from multiple sources which are using relational and time-series joins"?

[CLAassistant]

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