fix: correct relative links causing 404 on draft pages, Fixes #2358

[kedar49]

What kind of change does this PR introduce?
Bugfix
Issue Number:

• Closes 🐛 Bug:Clicking on "Draft 2019-09" in Introduction section leads to 404 Page Not Found #2358
  Screenshots/videos:
  N/A - Links were resolving to incorrect URLs (/draft/draft/2019-09/... instead of /draft/2019-09/...)
  If relevant, did you update the documentation?
  N/A
  Summary
  Fixed broken navigation links in the draft pages that were causing 404 errors. The issue was caused by incorrect relative paths in markdown files:

1. pages/draft/2019-09/index.md and pages/draft/2020-12/index.md had links like ../draft/2019-09/release-notes which resolved to /draft/draft/2019-09/release-notes (doubled draft segment). Changed to ./release-notes.
2. pages/draft/2019-09/release-notes.md had relative paths like ../../draft/2019-09/json-schema-core.html which resolved incorrectly. Changed to absolute URLs (https://json-schema.org/draft/2019-09/...) for external specification links.
   Does this PR introduce a breaking change?
   No

[github-actions]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (5ca1483) to head (8f16fcd).

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #2375   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files           30        30           
  Lines          672       672           
  Branches       211       211           
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  Hits           672       672           

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[Siddhartha20242]

Hi, @kedar49 please make sure to get the issue assigned first before you proceed with the PR. This will help the maintainers to speed up the process as they have been busy on their own work most of the times. Thank you:)

[kedar49]

Hi, @kedar49 please make sure to get the issue assigned first before you proceed with the PR. This will help the maintainers to speed up the process as they have been busy on their own work most of the times. Thank you:)

Yes , I'll keep that in mind for next contributions

[jdesrosiers]

You weren't assigned and this doesn't even fix the bug reported in the issue.