docs(CHANGES): Update for pausing

Author: tony

CHANGES

@@ -22,6 +22,27 @@
           enter: false
   ```
 
+- #750: Pause execution via `sleep_before: [int]` and `sleep_after: [int]`
+
+  ```yaml
+  session_name: Pause / skip command execution (command-level)
+  windows:
+  - panes:
+    - shell_command:
+      # Executes immediately
+      - echo "___$((11 + 1))___"
+      # Delays before sending 2 seconds
+      - cmd: echo "___$((1 + 3))___"
+        sleep_before: 2
+      # Executes immediately
+      - cmd: echo "___$((1 + 3))___"
+      # Pauses 2 seconds after
+      - cmd: echo "Stuff rendering here!"
+        sleep_after: 2
+      # Executes after earlier commands (after 2 sec)
+      - cmd: echo "2 seconds later"
+  ```
+
 - #701: `tmuxp freeze` now accepts `--quiet` and `--yes` along with the
   `--config-format` and filename (`--save-to`). This means you can do it all in
   one command: