docs: Update tox devenv docs link in setup documentation

[suganthsolamanraja]

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1. What GitHub issue is this PR addressing? Make sure that there is an accompanying issue to your PR.

   Fixes #NNNN

2. Fill out the following pre-review checklist:

   • I am adding a new automated test(s) to verify correctness of my new code
   • I am adding new logging messages
   • I am adding a new telemetry message
   • I am modifying authorization mechanisms
   • I am adding new credentials
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3. Please describe how your code solves the related issue.
   This PR updates the broken tox link for Setting up a development environment

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[suganthsolamanraja]

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