Update number of steps in regression step of ShewchukPCGLinearSolver.scn

[alxbilger]

[ci-depends-on https://github.com/sofa-framework/Regression/pull/120]

[with-all-tests]

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[sofabot]

[ci-depends-on] detected during build #1.

To unlock the merge button, you must

• Merge or close Update number of steps in regression step of ShewchukPCGLinearSolver.scn Regression#120
  For this build, the following CMake flags will be set
  -DREGRESSION_GIT_REPOSITORY='https://github.com/sofa-framework/Regression'
  -DREGRESSION_GIT_TAG='6544d048ee3f287cbcd87e2644dc0f08471bd177'

[alxbilger]

[ci-build][with-all-tests]

[sofabot]

[ci-depends-on] detected during build #2.

To unlock the merge button, you must

• Merge or close Update number of steps in regression step of ShewchukPCGLinearSolver.scn Regression#120
  For this build, the following CMake flags will be set
  -DREGRESSION_GIT_REPOSITORY='https://github.com/sofa-framework/Regression'
  -DREGRESSION_GIT_TAG='6544d048ee3f287cbcd87e2644dc0f08471bd177'

[bakpaul]

Could you increase the number of step of the CG + decrease the tolerance ? Otherwise I'll have to do this again in my PR...