release: bump version v1.6.0

Author: Revathyvenugopal162

pyproject.toml

@@ -11,7 +11,7 @@ theme-name = "ansys_sphinx_theme"
 [project]
 # Check https://flit.readthedocs.io/en/latest/pyproject_toml.html for all available sections
 name = "ansys-sphinx-theme"
-version = "1.6.dev0"
+version = "1.6.0"
 description = "A theme devised by ANSYS, Inc. for Sphinx documentation."
 readme = "README.rst"
 requires-python = ">=3.10,<4"