emacs: Fix cmd-f not working in Terminal (#34400)

Release Notes:

- N/A

assets/keymaps/default-macos.json

@@ -1098,6 +1098,7 @@
       "ctrl-cmd-space": "terminal::ShowCharacterPalette",
       "cmd-c": "terminal::Copy",
       "cmd-v": "terminal::Paste",
+      "cmd-f": "buffer_search::Deploy",
       "cmd-a": "editor::SelectAll",
       "cmd-k": "terminal::Clear",
       "cmd-n": "workspace::NewTerminal",