Clarify symbol search explanation for VS Code (#2770)

* Clarify symbol search explanation for VS Code

* Update lib/ruby_lsp/requests/document_symbol.rb

Co-authored-by: Vinicius Stock <vinistock@users.noreply.github.com>

---------

Co-authored-by: Vinicius Stock <vinistock@users.noreply.github.com>

lib/ruby_lsp/requests/document_symbol.rb

@@ -10,7 +10,8 @@ module Requests
     # informs the editor of all the important symbols, such as classes, variables, and methods, defined in a file. With
     # this information, the editor can populate breadcrumbs, file outline and allow for fuzzy symbol searches.
     #
-    # In VS Code, fuzzy symbol search can be accessed by opening the command palette and inserting an `@` symbol.
+    # In VS Code, symbol search known as 'Go To Symbol in Editor' and can be accessed with Ctrl/Cmd-Shift-O,
+    # or by opening the command palette and inserting an `@` symbol.
     class DocumentSymbol < Request
       extend T::Sig