chore(build): auto-generate vimdoc

Author: astronvimbot

doc/astrotheme.txt

@@ -1,4 +1,4 @@
-*astrotheme.txt*       For Neovim >= 0.9.0       Last change: 2023 December 08
+*astrotheme.txt*        For Neovim >= 0.9.0       Last change: 2024 January 16
 
 ==============================================================================
 Table of Contents                               *astrotheme-table-of-contents*
@@ -271,6 +271,8 @@ SUPPORTED PLUGINS                               *astrotheme-supported-plugins*
 
   vimwiki                                                  vimwiki
 
+  vim-illuminate                                           vim-illuminate
+
   which-key.nvim                                           which-key
   -----------------------------------------------------------------------------