FEAT: Layered impedance boundary (#5970)

Co-authored-by: pyansys-ci-bot <92810346+pyansys-ci-bot@users.noreply.github.com>

Author: Samuelopez-ansys

doc/changelog.d/5970.added.md

@@ -0,0 +1 @@
+Layered impedance boundary

doc/source/Getting_started/Contributing.rst

@@ -112,7 +112,7 @@ The following table illustrates the recommended conventions:
      - ``Hfss.create_setup()``, ``Hfss.create_linear_step_sweep()``
    * - ``usethickness``
      - ``thickness``
-     - ``Hfss.assign_coating()``
+     - ``Hfss.assign_finite_conductivity()``
    * - ``entities``
      - ``assignment``
      - ``Maxwell.assign_current_density()``