chore: update runllm widget configuration

[agiron123]

Why are the changes needed?

This PR updates the RunLLM widget configuration to use our new widget.runllm.com url.

How was this patch tested?

Tested by adding URL to the docs site and making sure that the docs widget renders.

Check all the applicable boxes

If you would like to test in a staging domain, please let me know so I can add to our ReCAPTCHA validation.

This change is really just updating where you get the latest bits of the runllm widget from.

• I updated the documentation accordingly.
• All new and existing tests passed.
• All commits are signed-off.

Related PRs

Docs link

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.92%. Comparing base (5b0d787) to head (7eae6f6).
Report is 117 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5530      +/-   ##
==========================================
- Coverage   60.97%   60.92%   -0.05%     
==========================================
  Files         794      796       +2     
  Lines       51488    51689     +201     
==========================================
+ Hits        31397    31494      +97     
- Misses      17199    17288      +89     
- Partials     2892     2907      +15     

Flag	Coverage Δ
unittests-datacatalog	69.31% <ø> (ø)
unittests-flyteadmin	58.73% <ø> (+0.04%)	⬆️
unittests-flytecopilot	17.79% <ø> (ø)
unittests-flytectl	67.41% <ø> (-0.63%)	⬇️
unittests-flyteidl	79.04% <ø> (ø)
unittests-flyteplugins	61.85% <ø> (ø)
unittests-flytepropeller	57.25% <ø> (-0.04%)	⬇️
unittests-flytestdlib	65.59% <ø> (ø)

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