fix:-fixed go to project button layout

[ApekshaRao27]

fix:-fixed go to project button layout when navigating through open issues,without altering the existing styles.
Note: Contribution guide mentions Contributors.md, but the file does not exist in the repository.

[Sean-Kenneth-Doherty]

I tested this locally. The branch builds and the generated page no longer has nested anchors, but it needs cleanup before merge.

Checks run:

• pnpm build passes
• generated dist/index.html has max anchor depth 1 / no nested anchors
• blank-target link scan on the built page

Blockers / follow-ups:

• git diff --check main...HEAD fails because src/components/ProjectCard.astro:45 has trailing whitespace.
• Please remove the generated .astro/* files from the PR.
• The new target="_blank" links are missing rel="noopener noreferrer"; the built-page scan found 313 blank-target anchors without rel, including both .Card-Real-Link and .Card-Link.
• The CTA uses an inline style="text-decoration: none;"; this should live in the existing .Card-Link CSS instead.
• src/styles/global.css adds a site-wide focus-visible rule, which may be useful, but it is unrelated to this card-link bug and should probably be a separate focused PR.