docs: list 0.9.x as supported

[nightcityblade]

Summary

Add the current 0.9.x release line to the security policy's supported-version table while retaining support for 0.8.x.

Fixes #2216

List of files changed and why

• SECURITY.md — list the current 0.9.x stable line as supported.

How Has This Been Tested?

• git diff --check
• A targeted Python check verified that the major/minor line in crawl4ai/__version__.py has a supported row in SECURITY.md.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• N/A — this documentation-only change has no code requiring comments
• I have made corresponding changes to the documentation
• N/A — no unit-testable runtime behavior changed
• N/A — the targeted documentation checks pass; existing unit tests are unaffected

[SohamKukreti]

Thanks for the PR! One change please: 0.8.x should be marked as not supported.

The 0.9.3 release (2026-08-31) fixed five advisories (GHSA-q5rj-45vw-vp2g, GHSA-v2rm-hvrj-2x9q, GHSA-7g3g-vhm6-79f3, GHSA-xpp7-j28w-2gvx, GHSA-m446-hp3q-qfxp). None of them were backported to 0.8.x, and the last 0.8.x tag (v0.8.9) predates 0.9.0. So 0.8.x has known unpatched issues and the fix is to upgrade.

This also matches how the table was written originally: only the newest minor line is supported, the previous one says "upgrade recommended".

Otherwise, LGTM 👍

[SohamKukreti]

0.8.x should be marked as not supported as it has known known unpatched security issues which have been fixed in 0.9.0+ releases.

[nightcityblade]

Updated the table as requested: 0.9.x is supported, while 0.8.x is marked unsupported with an upgrade recommendation. Thanks for clarifying.

[nightcityblade]

The replacement PR with the requested update is #2269. It preserves the original one-commit, one-file scope.