docs: update footer to LF Projects Series LLC trademark disclaimer

[yashisrani]

• Please check if the PR fulfills these requirements

• The commit message follows our guidelines

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

/kind documentation

• What this PR does / why we need it:

Update website footer to reflect Volcano's conversion to a Series of
LF Projects, LLC. Replace the old Linux Foundation trademark usage
link with the required CNCF footer format that includes:

• "Copyright Volcano a Series of LF Projects, LLC" wording
• Link to https://lfprojects.org/policies/ for terms of use,
  trademark policy, and other project policies

• Which issue(s) this PR fixes:
  Update website footer to new LF Projects Series LLC trademark disclaimer #503

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[gemini-code-assist]

Code Review

This pull request updates the trademark and copyright disclaimer in the footer of the Docusaurus configuration. The review feedback correctly points out that the corresponding translation file for Chinese (Simplified) needs to be updated to match this change and maintain consistency.

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[gemini-code-assist]

The trademark disclaimer has been updated here, but the corresponding translation file i18n/zh-Hans/docusaurus-theme-classic/footer.json still contains the old Linux Foundation trademark text. Please update the translation file to match this change to ensure consistency across all supported languages.

For example, you can update the corresponding paragraph in i18n/zh-Hans/docusaurus-theme-classic/footer.json to:

<p>版权所有 Volcano a Series of LF Projects, LLC。关于网站使用条款、商标政策和其他项目政策，请参阅 <a href="https://lfprojects.org/policies/" target="_blank" rel="noopener noreferrer">LF Projects Policies</a>。</p>

[yashisrani]

/cc @JesseStutler @k82cn @Thor-wl

[JesseStutler]

Emm what's the background of changing this? It's foudation's requirement?

[yashisrani]

Emm what's the background of changing this? It's foudation's requirement?

@JesseStutler Based on the issue, the CNCF/Foundation team indicated that Volcano has been converted to a Series of LF Projects, LLC and requested updating the footer to match the LF Projects trademark and copyright guidelines. This PR implements that requested change.

[JesseStutler]

Why does the sentence structure look so hard to read...? I want to wait until other CNCF projects have completed their rectification before we follow. I don't want to have to revise it all over again.