ver: bump 0.12.0 version

Author: Revathyvenugopal162

pyproject.toml

@@ -5,7 +5,7 @@ build-backend = "flit_core.buildapi"
 [project]
 # Check https://flit.readthedocs.io/en/latest/pyproject_toml.html for all available sections
 name = "ansys-sphinx-theme"
-version = "0.12.dev0"
+version = "0.12.0"
 description = "A theme devised by ANSYS, Inc. for Sphinx documentation."
 readme = "README.rst"
 requires-python = ">=3.8,<4"