Facebook -> Meta Platforms on website footer + docs

Summary: Update company copyright on website footer + documentation pages, see [guidelines](https://www.internalfb.com/intern/wiki/Open_Source/Launch_an_OSS_Project/Launch_Preparation/Automated_Checkup/Terms_Of_Use_&_Privacy_Policy/).

Reviewed By: bottler

Differential Revision: D32649563

fbshipit-source-id: f285be79c185496832c5d41b839ee974234a8fa5

Author: patricklabatut

docs/conf.py

@@ -82,7 +82,7 @@ def run_role(self, name, options=None, content=None):
 # -- Project information -----------------------------------------------------
 
 project = "PyTorch3D"
-copyright = "Facebook Research"
+copyright = "Meta Platforms, Inc"
 author = "facebookresearch"
 
 # The short X.Y version

website/siteConfig.js

@@ -51,7 +51,7 @@ const siteConfig = {
 
   // @lint-ignore-every LICENSELINT
   // This copyright info is used in /core/Footer.js and blog RSS/Atom feeds.
-  copyright: `Copyright \u{00A9} ${new Date().getFullYear()} Facebook Inc`,
+  copyright: `Copyright \u{00A9} ${new Date().getFullYear()} Meta Platforms, Inc`,
 
   highlight: {
     // Highlight.js theme to use for syntax highlighting in code blocks.