Fix ios not found module share_extend

ios/Classes/ShareExtendPlugin.h

 #import <Flutter/Flutter.h>
 
-@interface FLTShareExtendPlugin : NSObject<FlutterPlugin>
+@interface ShareExtendPlugin : NSObject<FlutterPlugin>
 @end

ios/Classes/ShareExtendPlugin.m

 #import "ShareExtendPlugin.h"
 
-@implementation FLTShareExtendPlugin
+@implementation ShareExtendPlugin
 
 + (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
     FlutterMethodChannel* shareChannel = [FlutterMethodChannel

pubspec.yaml

@@ -24,7 +24,7 @@ flutter:
         package: com.zt.shareextend
         pluginClass: ShareExtendPlugin
       ios:
-        pluginClass: FLTShareExtendPlugin
+        pluginClass: ShareExtendPlugin
 
   # To add assets to your plugin package, add an assets section, like this:
   # assets: