doc: Update backends in readme (#404)

Co-authored-by: pyansys-ci-bot <[email protected]>

Author: AlejandroFernandezLuces

README.rst

@@ -36,10 +36,15 @@ different plotting backends.
 
 The Visualization Interface Tool offers these main features:
 
-* Serves as an interface between PyAnsys and other plotting libraries (although only
-  `PyVista <https://docs.pyvista.org/version/stable/>`_ is supported currently).
-* Provides out-of-the box picking, viewing, and measuring functionalities.
-* Supplies an extensible class for adding custom functionalities.
+- Serves as an interface between PyAnsys and other plotting libraries.
+- Provides out-of-the box picking, viewing, and measuring functionalities.
+- Supplies an extensible class for adding custom functionalities.
+
+Currently, the following plotting libraries are supported.
+
+- `PyVista <https://docs.pyvista.org/index.html>`_.
+- `Trame <https://www.kitware.com/trame/>`_, a web view for PyVista.
+- `Plotly <https://plotly.com/>`_.
 
 Documentation and issues
 ------------------------

doc/changelog.d/404.miscellaneous.md

@@ -0,0 +1 @@
+Doc: Update backends in readme