fix: Don't error if data does not have name attribute

[hoxbro]

Fixes https://discourse.holoviz.org/t/issue-with-reactivehtml-components-in-panel-1-5-5/8522

[holovizbot]

This pull request has been mentioned on HoloViz Discourse. There might be relevant details there:

https://discourse.holoviz.org/t/issue-with-reactivehtml-components-in-panel-1-5-5/8522/4

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.78%. Comparing base (dad982b) to head (ef64f97).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7655      +/-   ##
==========================================
+ Coverage   86.77%   86.78%   +0.01%     
==========================================
  Files         346      346              
  Lines       52225    52232       +7     
==========================================
+ Hits        45318    45332      +14     
+ Misses       6907     6900       -7     

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