Sync classref with current source

classes/class_physicsmaterial.rst

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+.. Generated automatically by doc/tools/makerst.py in Godot's source tree.
+.. DO NOT EDIT THIS FILE, but the PhysicsMaterial.xml source instead.
+.. The source is found in doc/classes or modules/<name>/doc_classes.
+
+.. _class_PhysicsMaterial:
+
+PhysicsMaterial
+===============
+
+**Inherits:** :ref:`Resource<class_resource>` **<** :ref:`Reference<class_reference>` **<** :ref:`Object<class_object>`
+
+**Category:** Core
+
+Brief Description
+-----------------
+
+
+
+Member Variables
+----------------
+
+  .. _class_PhysicsMaterial_absorbent:
+
+- :ref:`bool<class_bool>` **absorbent**
+
+  .. _class_PhysicsMaterial_bounce:
+
+- :ref:`float<class_float>` **bounce**
+
+  .. _class_PhysicsMaterial_friction:
+
+- :ref:`float<class_float>` **friction**
+
+  .. _class_PhysicsMaterial_rough:
+
+- :ref:`bool<class_bool>` **rough**
+
+