fix(footer): remove duplicated opening <a> in CC license icons

[Vidminas]

The Creative Commons icon link rendered two identical opening <a> tags followed by a single closing </a>, producing invalid nested-anchor HTML. Delete the duplicate opening tag.

🚀 What type of change is this?

• 🐛 Bug fix (A non-breaking change that fixes an issue)
• ✨ New feature (A non-breaking change that adds functionality)
• 💅 Style change (A change that only affects formatting, visuals, or styling)
• 📚 Documentation update (Changes to documentation only)
• 🧹 Refactor or chore (A code change that neither fixes a bug nor adds a feature)
• 💥 Breaking change (A fix or feature that would cause existing functionality to not work as expected)

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🎯 What is the purpose of this change?

The footer Creative-Commons license icons open with two identical <a> tags but close with
a single </a> (site_footer_license.html), producing invalid nested-anchor HTML. Browsers
recover from it, but it's malformed markup and can confuse assistive tech and validators. I caught this during keyboard navigation accessibility testing.

Fix. Delete the duplicate opening <a>.

Verified on the academic-cv starter: the built footer now contains exactly one aria-label="Creative Commons" anchor with zero nested <a><a> sequences.

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📸 Screenshots or Screencast (if applicable)

n/a — no visual change; the fix is valid HTML (<a><a><svg>… → <a><svg>…).

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ℹ️ Documentation Check

• No, this change does not require a documentation update.
• Yes, I have updated the documentation accordingly (or will in a follow-up PR).

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📜 Contributor Agreement

Thank you for your contribution!

• By checking this box, I confirm that I have read and agree to the HugoBlox Contributor License Agreement (CLA).

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[github-actions]

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Awesome work, we'll take a look soon! ✨