fix(doc): update notice and open statistic label

[ShannonDing]

What is the purpose of the change

[ISSUE #219 ]
fix(doc): update notice and open statistic label

Brief changelog

fix(doc): update notice and open statistic label

Verifying this change

fix(doc): update notice and open statistic label

Follow this checklist to help us incorporate your contribution quickly and easily. Notice, it would be helpful if you could finish the following 5 checklist(the last one is not necessary)before request the community to review your PR.

• Make sure there is a Github issue filed for the change (usually before you start working on it). Trivial changes like typos do not require a Github issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue.
• Format the pull request title like [ISSUE #123] Fix UnknownException when host config not exist. Each commit in the pull request should have a meaningful subject line and body.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Write necessary unit-test(over 80% coverage) to verify your logic correction, more mock a little better when a cross-module dependency exists.
• If this contribution is large, please file an Apache Individual Contributor License Agreement.

[codecov-io]

Codecov Report

Merging #220 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #220   +/-   ##
=======================================
  Coverage   45.53%   45.53%           
=======================================
  Files         171      171           
  Lines       10243    10243           
=======================================
  Hits         4664     4664           
  Misses       5579     5579

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1a7f8b2...514ec81. Read the comment docs.