FIX: create port on component (grpc) bug fixed

[svandenb-dev]

Fixing a bug when single pin is found for reference.

closes #1627

[Copilot]

Pull Request Overview

This PR fixes a bug in the create_port_on_component method where attempting to set the is_pin attribute on a list instead of a single pin object was causing an error when only one reference pin was found.

• Fixed incorrect attribute assignment on list object by indexing to access the single pin element

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.89%. Comparing base (6f6fef7) to head (0d02ee5).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1628   +/-   ##
=======================================
  Coverage   70.89%   70.89%           
=======================================
  Files         226      226           
  Lines       40690    40690           
=======================================
  Hits        28847    28847           
  Misses      11843    11843           

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