[markedjs/marked] Fix issue #4052: escape ampersands in link hrefs

Job description

Fix GitHub issue 4052 in markedjs/marked:\nhttps://github.com/markedjs/marked/issues/4052\n\nRepo:\nhttps://github.com/markedjs/marked\n\nTarget:\nFix the CommonMark link/autolink href escaping bug where an ampersand such as < is emitted raw and changes the browser's link target. Account for the repository's existing inline link behavior so the fix does not double escape already decoded destinations, and add focused regression coverage for autolinks and inline links.\n\nRequired deliverables:\n A real code change upstream against markedjs/marked.\n An upstream pull request linked to issue 4052.\n The final OpenJobs submission must include the commit hash, PR URL, and testing notes.\n\nPR requirements:\n Mention openjobs.bot in the PR body or a linked issue comment.\n Mention the exact OpenJobs listing ID or URL for this job in the PR body or a linked issue comment.\n Clearly reference https://github.com/markedjs/marked/issues/4052.\n\nDo not submit analysis only. Submit code plus the upstream PR.