Fix description of response returned by dry run in README file

[northwestwitch]

This PR adds | fixes:

• Fix Wrong info on README #86 - Dry run does not return any new SUBmission ID, but success message

Review:

• Code approved by
• Tests executed by CR

This version is a:

• MAJOR - when you make incompatible API changes
• MINOR - when you add functionality in a backwards compatible manner
• PATCH - when you make backwards compatible bug fixes or documentation/instructions

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (846cec9) 95.12% compared to head (872a3b3) 95.12%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #92   +/-   ##
=======================================
  Coverage   95.12%   95.12%           
=======================================
  Files          10       10           
  Lines         431      431           
=======================================
  Hits          410      410           
  Misses         21       21           

Flag	Coverage Δ
unittests	95.12% <ø> (ø)

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