doc: Bump toolchain version to 2023.03

Author: kolerov

doc/conf.py

@@ -49,17 +49,17 @@
 
 # General information about the project.
 project = 'GNU Toolchain for ARC User Manual'
-copyright = '2016-2022, Synopsys'
+copyright = '2016-2023, Synopsys'
 author = 'Synopsys'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
 # The short X.Y version.
-version = '2022.09'
+version = '2023.03'
 # The full version, including alpha/beta/rc tags.
-release = '2022.09'
+release = '2023.03'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.