fix: Fix WorkflowTemplate icons to be more cohesive

[simster7]

Before:

After:

Top is WorkflowTemplate, bottom is ClusterWorkflowTemplate

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@5a1ac20). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #2607   +/-   ##
=========================================
  Coverage          ?   11.18%           
=========================================
  Files             ?       83           
  Lines             ?    32647           
  Branches          ?        0           
=========================================
  Hits              ?     3653           
  Misses            ?    28497           
  Partials          ?      497

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