[GOODBOY008]

Purpose of the pull request

Update the community pages to reflect Zhongqiang Gong joining the PPMC.

What's changed?

• Move Zhongqiang Gong (GOODBOY008 / gongzhongqiang) from Committers to PPMC in both team pages, bringing the listed PPMC membership to 12.
• Update CO40 in both maturity pages from one to two new committers who subsequently joined the PPMC, retain the cumulative new-committer count of three, and refresh the assessment date and supporting links.
• Add the existing committer Nikita Kuprins to the Chinese team page so its roster matches the English page.

Validation

• Markdown lint passed for all four changed files with the lockfile-pinned markdownlint-cli2 version 0.23.2.
• git diff --check passed.
• Confirmed both team pages list the same 12 PPMC members and one other committer, with no duplicate entries.
• Confirmed both maturity copies are identical and only CO40 changed; other assessment criteria and statuses are preserved.
• Documentation-only change; the full website build and Java tests were not run.

Checklist

• I have read the Contributor Guide.
• I have written the necessary doc or comment.
• I have added the necessary unit tests and all cases have passed. (Not applicable: documentation-only changes.)

[delei]

LGTM