Update version number

Author: stevenbird

nltk/VERSION

@@ -1 +1 @@
-3.8.2
+3.9b1

web/conf.py

@@ -119,16 +119,16 @@ def generate_custom_files():
 
 # General information about the project.
 project = "NLTK"
-copyright = "2023, NLTK Project"
+copyright = "2024, NLTK Project"
 
 # 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 = "3.8.2"
+version = "3.9"
 # The full version, including alpha/beta/rc tags.
-release = "3.8.2"
+release = "3.9b1"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.