Updated readme graphium-train to newer version

[DomInvivo]

Changelogs

• Updating the ## Running an experiment section in the Readme

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Checklist:

• Was this PR discussed in an issue? Yes, closing Outdated Instructions in README #464
• Was this tested? No need for unit-test, but the command lines were tested and are functional

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discussion related to that PR

[codecov]

Codecov Report

Merging #500 (70133a4) into main (45f5016) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #500   +/-   ##
=======================================
  Coverage   71.54%   71.54%           
=======================================
  Files          93       93           
  Lines        8702     8702           
=======================================
  Hits         6226     6226           
  Misses       2476     2476           

Flag	Coverage Δ
unittests	71.54% <ø> (ø)

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Components	Coverage Δ
ipu	49.14% <ø> (ø)