Delete successful and skipped workflow runs (#4177)

refs #4134

Author: beutlich

.github/workflows/checkCron.yml

@@ -71,3 +71,15 @@ jobs:
           codespell -L supportt ./ModelicaTest/Rotational.mo
           codespell -L lamda,inport ./ModelicaTestConversion4.mo
           codespell --skip ./ObsoleteModelica4.mo,./Modelica/package.mo,./Modelica/Clocked/RealSignals/Periodic/StateSpace.mo,./Modelica/Constants.mo,./Modelica/Blocks/Continuous.mo,./Modelica/StateGraph.mo,./Modelica/Electrical/Digital.mo,./Modelica/Electrical/Polyphase/Examples/PolyphaseRectifier.mo,./Modelica/Electrical/Polyphase/Examples/Utilities/PolyphaseRectifierData.mo,./Modelica/Fluid/Dissipation.mo,./Modelica/Resources,./Modelica/Media/IdealGases/package.mo,./Modelica/Media/IdealGases/Common/SingleGasesData.mo,./Modelica/Media/IdealGases/Common/Functions.mo,./Modelica/Media/IdealGases/Common/package.mo,./Modelica/Media/Air/ReferenceAir.mo,./Modelica/Media/R134a.mo,./Modelica/Media/Water/IF97_Utilities.mo,./Modelica/Electrical/Polyphase/UsersGuide/References.mo,./Modelica/Electrical/Spice3.mo,./Modelica/Electrical/Machines/BasicMachines/Components/PartialAirGapDC.mo,./Modelica/Electrical/Machines/Examples/ControlledDCDrives,./Modelica/Electrical/Analog/UsersGuide/References.mo,./Modelica/Math/package.mo,./Modelica/Mechanics/Rotational,./Modelica/Mechanics/Translational,./Modelica/Mechanics/MultiBody,./Modelica/Magnetic/FluxTubes/UsersGuide/Contact.mo,./Modelica/Magnetic/FluxTubes/Material/SoftMagnetic/NickelIron,./Modelica/Magnetic/FundamentalWave/UsersGuide/References.mo,./ModelicaTest/Rotational.mo,./ModelicaTestConversion4.mo,./.CI,./.github,./.git,*.png -L nin,inport,te,sinc,vie,commutating
+  clean_workflow_runs:
+    timeout-minutes: 5
+    if: github.repository_owner == 'modelica'
+    runs-on: ubuntu-latest
+    steps:
+    - name: Delete workflow runs
+      uses: dmvict/clean-workflow-runs@v1
+      with:
+        run_conclusions: skipped,success
+        save_period: 90
+        save_min_runs_number: 25
+        dry: false