fix: comments in neighbours function

[fcgxz2003]

Fix comments in neighbours function.

Related Issue

Motivation and Context

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (bd57994) 51.92% compared to head (c7731db) 51.91%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3069      +/-   ##
==========================================
- Coverage   51.92%   51.91%   -0.01%     
==========================================
  Files         163      163              
  Lines       18558    18558              
==========================================
- Hits         9636     9635       -1     
- Misses       8260     8261       +1     
  Partials      662      662              

Flag	Coverage Δ
Object-compatibility-e2etests	∅ <ø> (∅)
e2etests	∅ <ø> (∅)
unittests	51.91% <ø> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
scheduler/networktopology/network_topology.go	100.00% <ø> (ø)

... and 1 file with indirect coverage changes

[gaius-qi]

LGTM