Update docs copyright year (#2767)

Author: svekars

conf.py

@@ -150,7 +150,7 @@ def reset_seeds(gallery_conf, fname):
 
 # General information about the project.
 project = 'PyTorch Tutorials'
-copyright = '2023, PyTorch'
+copyright = '2024, PyTorch'
 author = 'PyTorch contributors'
 
 # The version info for the project you're documenting, acts as replacement for