[Docs] Update get_started.md

[ddebby]

Fix error in the chinese get_started file

完成的安装脚本 ==> 完整的安装脚本

Thanks for your contribution and we appreciate it a lot. The following instructions would make your pull request more healthy and more easily get feedback. If you do not understand some items, don't worry, just make the pull request and seek help from maintainers.

Motivation

Please describe the motivation of this PR and the goal you want to achieve through this PR.

Modification

Please briefly describe what modification is made in this PR.

BC-breaking (Optional)

Does the modification introduce changes that break the backward-compatibility of the downstream repos?
If so, please describe how it breaks the compatibility and how the downstream projects should modify their code to keep compatibility with this PR.

Use cases (Optional)

If this PR introduces a new feature, it is better to list some use cases here, and update the documentation.

Checklist

1. Pre-commit or other linting tools are used to fix the potential lint issues.
2. The modification is covered by complete unit tests. If not, please add more unit test to ensure the correctness.
3. If the modification has potential influence on downstream projects, this PR should be tested with downstream projects, like MMDet or MMDet3D.
4. The documentation has been modified accordingly, like docstring or example tutorials.

[CLAassistant]

All committers have signed the CLA.

[Junjun2016]

Hi @ddebby
Thanks for your contribution.
Could you please sign the CLA?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.55%. Comparing base (2b2f107) to head (daa9e04).
Report is 297 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1066   +/-   ##
=======================================
  Coverage   89.55%   89.55%           
=======================================
  Files         119      119           
  Lines        6626     6626           
  Branches     1034     1034           
=======================================
  Hits         5934     5934           
  Misses        488      488           
  Partials      204      204           

Flag	Coverage Δ
unittests	89.55% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[Junjun2016]