Add note about editor limitations (#1910)

Add note about editor limitations [skip ci]

Co-authored-by: Andy Waite <andyw8@users.noreply.github.com>

EDITORS.md

@@ -3,6 +3,10 @@
 This file contains community driven instructions on how to set up the Ruby LSP in editors other than VS Code. For VS
 Code, use the official [Ruby LSP extension](https://marketplace.visualstudio.com/items?itemName=Shopify.ruby-lsp).
 
+> [!NOTE]
+> Some Ruby LSP features may be unavailable or limited due to incomplete implementations of the Language Server
+> Protocol, such as dynamic feature registration, or [file watching](https://github.com/Shopify/ruby-lsp/issues/1456).
+
 <!-- When adding a new editor to the list, either link directly to a website containing the instructions or link to a
 new H2 header in this file containing the instructions. -->