docs(draft-07): fix broken obsolete link leading to 404 (#2482)

[Prachidg]

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

• Closes 🐛 Bug: Broken link on Draft-07 page leading to 404 Not Found at /obsolete #2482
  Screenshots/videos:
  N/A (documentation link fix)
  If relevant, did you update the documentation?
  Yes, updated pages/draft-07/index.md.
  Summary
  On the Draft-07 page, under the Release Notes section, there was a note stating:

"The -00 versions may be found in the obsolete directory."
Clicking that link attempted to navigate to https://json-schema.org/obsolete, which resulted in a 404 Not Found error.
Since the -00 draft documents are already explicitly listed and linked directly above on the same page under the "Obsolete Draft 7 Documents" section, this PR updates the link to point to the in-page anchor (#obsolete-draft-7-documents).
Does this PR introduce a breaking change?
No

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (d0f61e9) to head (f628943).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #2483   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files           31        31           
  Lines          695       695           
  Branches       215       215           
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  Hits           695       695           

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