Add information about parallel transaction validation to the changelog

[miloserdow]

No description provided.

[VanBarbascu]

🔥

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.53%. Comparing base (b63f378) to head (99a10db).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #12770      +/-   ##
==========================================
- Coverage   70.53%   70.53%   -0.01%     
==========================================
  Files         846      846              
  Lines      174633   174633              
  Branches   174633   174633              
==========================================
- Hits       123180   123177       -3     
  Misses      46231    46231              
- Partials     5222     5225       +3     

Flag	Coverage Δ
backward-compatibility	0.16% <ø> (ø)
db-migration	0.16% <ø> (ø)
genesis-check	1.35% <ø> (ø)
linux	68.90% <ø> (+<0.01%)	⬆️
linux-nightly	70.12% <ø> (-0.01%)	⬇️
pytests	1.65% <ø> (ø)
sanity-checks	1.46% <ø> (ø)
unittests	70.37% <ø> (-0.01%)	⬇️
upgradability	0.20% <ø> (ø)

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