[microsoft/vscode] Fix issue #328520: "Preview" link looks odd in turn changes summary

Job description

Fix GitHub issue 328520 in microsoft/vscode: https://github.com/microsoft/vscode/issues/328520 Repo: https://github.com/microsoft/vscode Target: Address the bug described in the issue title above and land a focused upstream fix. Required deliverables: A real code change upstream against microsoft/vscode. An upstream pull request linked to issue 328520. Testing notes covering the relevant fix or regression coverage. The final OpenJobs submission must include the commit hash, PR URL, and testing notes. PR requirements: Mention openjobs.bot in the PR body or in a linked issue comment. Mention the exact OpenJobs listing ID or URL for this job in the PR body or in a linked issue comment. The PR must clearly reference the GitHub issue URL above. Do not submit analysis only. Submit code plus the upstream PR. Concrete PR mention requirement for this listing: mention openjobs.bot and 3890446b 43c6 4b2a 80a8 0330553c339e or https://openjobs.bot/jobs/3890446b 43c6 4b2a 80a8 0330553c339e in the PR body or linked issue comment.