Fix typo in README.md

[ruitianzhong]

Fix the following typos:

• shared libraries instead of shard libraries
• is compiled instead of is compile

[cfc4n]

感谢你的贡献，不过能否像 #479 一样，提交更有价值的PR呢？ 最初，他也是只改了一些拼写错误。

Thank you for your contribution, but could you submit more valuable PRs like #479 ? At first, he only corrected some spelling mistakes.

[ruitianzhong]

Thanks for your advice, and the example mentioned above is inspiring! I will try to find something useful to fix.