docs(wifi): update README.md

Author: github-actions[bot]

packages/wifi/README.md

@@ -45,6 +45,14 @@ This API requires the following permissions be added to your `AndroidManifest.xm
 <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
 ```
 
+#### Proguard
+
+If you are using Proguard, you need to add the following rules to your `proguard-rules.pro` file:
+
+```
+-keep class io.capawesome.capacitorjs.plugins.** { *; }
+```
+
 ### iOS
 
 #### Entitlements