Removing broken link

[sekyondaMeta]

Removing broken link in Contributions.md solving issue: #3503

Fixes #3503

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/tutorials/3504

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❌ 1 New Failure

As of commit 2528cca with merge base 120068e ():

NEW FAILURE - The following job has failed:

• link check on PR / linkChecker (gh)
  Process completed with exit code 1.

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[github-actions]

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