fix(autocmds): update available exposed autocommands

Author: mehalter

src/content/docs/reference/autocmds.mdx

@@ -39,10 +39,10 @@ Neovim autocmd events, check the help page with `:h autocmd-events`.
   up handlers for the internal LSP mechanisms. `AstroLspSetup` is triggered when
   we have finished setting up these handlers and configuring `lspconfig`.
 
-- `AstroMasonUpdateCompleted`: AstroNvim provides a custom command for easily
-  updating all packages that are currently installed with Mason using
-  `:AstroMasonUpdateAll`. `AstroMasonUpdateCompleted` is triggered after all of the
-  available updates have been applied.
+- `AstroUpdateCompleted`: AstroNvim provides a custom command for easily
+  updating all plugins and packages using `:AstroUpdate`.
+  `AstroUpdateCompleted` is triggered after all of the available updates have
+  been applied.
 
 - `AstroRenameFilePre`: AstroCore provides a `rename_file` method for easily
   renaming files. `AstroRenameFilePre` is triggered immediately prior to