add podspec change

Author: dotNetkow

docs/main/updating/4-0.md

@@ -41,6 +41,12 @@ post_install do |installer|
 end
 ```
 
+Additionally, update the `podspec` file at the root of the project:
+
+```
+s.ios.deployment_target  = '13.0'
+```
+
 ### Remove Unnecessary Code
 
 Remove unused `touchesBegan` method from `AppDelegate.swift`
@@ -280,4 +286,4 @@ The `@capacitor/storage` plugin has been renamed to `@capacitor/preferences` to
 
 ### Splash Screen
 
-- If switching to the new Android 12 Splash Screen API, most configuration options won't be available for the initial Splash Screen, but they will still be available for the Splash Screen that appears when calling `show()`. Also, on Android 12+ devices the initial Splash Screen is different from the Splash Screen shown by `show()` method.
+- If switching to the new Android 12 Splash Screen API, most configuration options won't be available for the initial Splash Screen, but they will still be available for the Splash Screen that appears when calling `show()`. Also, on Android 12+ devices the initial Splash Screen is different from the Splash Screen shown by `show()` method.