fix(static): use correct format for last modified

[janjhnsn]

🔗 Linked issue

#1016

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Changed Last-Modified format to be correct (UTC) and not ISO as currecntly. Resolves #1016

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[pi0]

Thanks ❤️

[codecov]

Codecov Report

Merging #1017 (7db2bdf) into main (8f9c3e2) will not change coverage.
The diff coverage is n/a.

❗ Current head 7db2bdf differs from pull request most recent head 26ac8e6. Consider uploading reports for the commit 26ac8e6 to get more accurate results

@@           Coverage Diff           @@
##             main    #1017   +/-   ##
=======================================
  Coverage   67.69%   67.69%           
=======================================
  Files          60       60           
  Lines        6167     6167           
  Branches      692      692           
=======================================
  Hits         4175     4175           
  Misses       1982     1982           
  Partials       10       10           

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[pi0]

Can you please rebase your PR and fix lint issues? (i don't have push access to your fork)