Drop hardcoded Docusaurus version from CLAUDE.md

[DanPiazza-Netwrix]

Summary

• CLAUDE.md stated the project is "built with Docusaurus v3.8.1," but the actual pinned version in package.json/package-lock.json has since moved to 3.10.2
• A hardcoded version number in project guidance drifts silently as dependencies are upgraded, so it's dropped rather than corrected to a specific number

Closes #1406

[github-actions]

Code Review

No correctness issues found.

This PR is a one-line edit to CLAUDE.md prose. No changes to src/config/products.js, docusaurus.config.js, sidebars, scripts/, or .github/workflows/, so there is no build, routing, KB-pipeline, or CI impact. No security surface touched.

Verified the premise: package.json pins @docusaurus/* at ^3.10.2, so the removed v3.8.1 claim was indeed stale.

Optional follow-up (out of scope for this PR): the same stale version string still appears in two other places:

• docs/CLAUDE.md:7 — "built with Docusaurus v3.8.1 with multi-version support"
• README.md:7 — "Docusaurus v3.8.1"

docs/CLAUDE.md is the one worth flagging, since it is loaded into agent context automatically when working in docs/ — the stale version claim survives this fix there. Applying the same removal to both would make the change complete, but the current diff is correct as-is.