add time change

README.md

@@ -15,6 +15,7 @@ This OBS Studio Lua script writes your current stream uptime to a text file, wit
 4. Click the `+` button and select `obs_uptime_to_file.lua`.
 5. Set the `Output File Path` to where you want the uptime to be written.
 6. (Optional) Set the `Format String` to customize how the uptime appears.
+7. (Optional) Set the `Update Interval (seconds)` to control how often the file is updated (default: 1 second).
 
 ## Format String
 You can control how the uptime is displayed using the `Format String` property. Use these placeholders:
@@ -32,7 +33,7 @@ You can control how the uptime is displayed using the `Format String` property.
  - `{M} minutes` → `83 minutes`
 
 ## How It Works
-- When you start streaming, the script begins writing the uptime to your chosen file every second.
+- When you start streaming, the script begins writing the uptime to your chosen file at the interval you set (default: every second).
 - When you stop streaming, the file is erased (emptied), so nothing will display if you use it as a text source.
 
 ## Use Case