vim: Document jk (#11150)

Release Notes:


- N/A

docs/src/configuring_zed__configuring_vim.md

@@ -88,6 +88,19 @@ You can see the bindings that are enabled by default in vim mode [here](https://
 
 The details of the context are a little out of scope for this doc, but suffice to say that `menu` is true when a menu is open (e.g. the completions menu), `VimWaiting` is true after you type `f` or `t` when we’re waiting for a new key (and you probably don’t want bindings to happen). Please reach out on [GitHub](https://github.com/zed-industries/zed) if you want help making a key bindings work.
 
+### Examples
+
+Binding `jk` to exit insert mode and go to normal mode:
+
+```
+{
+  "context": "Editor && vim_mode == insert && !menu",
+  "bindings": {
+    "j k": ["vim::SwitchMode", "Normal"]
+  }
+}
+```
+
 ## Subword motion
 
 Subword motion is not enabled by default. To enable it, add these bindings to your keymap.