fix: update broken CMUdict link to GitHub mirror in datasets/cmudict README

[algojogacor]

Summary

Fixes #11868

The CMUdict README references http://www.speech.cs.cmu.edu/cgi-bin/cmudict#about, a legacy URL that no longer resolves (HTTP status 0 — connection failure). The CMU Pronouncing Dictionary is now maintained as part of the CMU Sphinx project on GitHub.

Root Cause

The [cmudict] reference link at the bottom of lib/node_modules/@stdlib/datasets/cmudict/README.md points to the old CMU Speech Group CGI endpoint, which has been decommissioned. The resource is permanently unavailable at that URL.

Fix

Replaced the broken URL with the canonical GitHub mirror: https://github.com/cmusphinx/cmudict. This is the official upstream repository for the CMU Pronouncing Dictionary, actively maintained by the CMU Sphinx project.

Changes

• lib/node_modules/@stdlib/datasets/cmudict/README.md: update reference link URL (+1 -1 lines)

Testing

• Visit the new URL: https://github.com/cmusphinx/cmudict resolves correctly and contains the dictionary data ✅
• Old URL confirmed broken: http://www.speech.cs.cmu.edu/cgi-bin/cmudict#about still returns connection failure ✅
• All other dataset README links: unaffected (only cmudict reference changed) ✅

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