docs: Suggest alternative to Vim tag navigation feature (#48735)

Martin Pool and Kunall Banerjee created 

Closes N/A

- [ ] Tests or screenshots needed? -- no
- [x] Code Reviewed 
- [x] Manual QA -- I ran `mdbook serve` and checked the output looks OK

Release Notes:

- N/A

---------

Co-authored-by: Kunall Banerjee <hey@kimchiii.space>

Change summary

docs/src/vim.md | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

Detailed changes

docs/src/vim.md 🔗 

@@ -532,14 +532,15 @@ If you're using vim mode on Linux or Windows, you may find it overrides keybindi
 {
   "context": "Editor && !menu",
   "bindings": {
+    "ctrl-f": "buffer_search::Deploy",      // vim default: page down
     "ctrl-c": "editor::Copy",               // vim default: return to normal mode
     "ctrl-x": "editor::Cut",                // vim default: decrement
     "ctrl-v": "editor::Paste",              // vim default: visual block mode
+    "ctrl-a": "editor::SelectAll",          // vim default: increment
     "ctrl-y": "editor::Undo",               // vim default: line up
-    "ctrl-f": "buffer_search::Deploy",      // vim default: page down
+    "ctrl-t": "project_symbols::Toggle",    // vim default: go to older tag
     "ctrl-o": "workspace::Open",            // vim default: go back
     "ctrl-s": "workspace::Save",            // vim default: show signature
-    "ctrl-a": "editor::SelectAll",          // vim default: increment
     "ctrl-b": "workspace::ToggleLeftDock"   // vim default: down
   }
 },