Fix chain simulator root hash

[axenteoctavian]

Reasoning behind the pull request

Proposed changes

Testing procedure

Pre-requisites

Based on the Contributing Guidelines the PR author and the reviewers must check the following requirements are met:

• was the PR targeted to the correct branch?
• if this is a larger feature that probably needs more than one PR, is there a feat branch created?
• if this is a feat branch merging, do all satellite projects have a proper tag inside go.mod?

[codecov]

Codecov Report

❌ Patch coverage is 0% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.59%. Comparing base (c635e8b) to head (22db835).

Files with missing lines	Patch %	Lines
...hainSimulator/components/testOnlyProcessingNode.go	0.00%	10 Missing ⚠️

Additional details and impacted files

@@                      Coverage Diff                      @@
##           feat/supernova-async-exec    #7659      +/-   ##
=============================================================
- Coverage                      77.59%   77.59%   -0.01%     
=============================================================
  Files                            877      877              
  Lines                         121752   121762      +10     
=============================================================
+ Hits                           94476    94478       +2     
- Misses                         21008    21014       +6     
- Partials                        6268     6270       +2     

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