chore: fix code snippets in rest api section

src/fragments/lib-v1/graphqlapi/flutter/authz/20_oidc.mdx

@@ -11,6 +11,6 @@ class CustomOIDCProvider extends OIDCAuthProvider {
 }
 ```
 
-import warning from "/src/fragments/lib/graphqlapi/flutter/authz/2X_add_plugin.mdx";
+import warning from "/src/fragments/lib-v1/graphqlapi/flutter/authz/2X_add_plugin.mdx";
 
 <Fragments fragments={{flutter: warning}} />

src/fragments/lib-v1/restapi/flutter/delete.mdx

@@ -1,17 +1,15 @@
 ## DELETE requests
 
   ```dart
-  Future<void> deleteTodo() async {
-    try {
-      const options = RestOptions(path: '/todo/1');
-      final restOperation = Amplify.API.delete(restOptions: options);
-      final response = await restOperation.response;
-      print('DELETE call succeeded');
-      print(response.body);
-    } on ApiException catch (e) {
-      print('DELETE call failed: $e');
-    }
+Future<void> deleteTodo() async {
+  try {
+    final restOperation = Amplify.API.delete('todo/1');
+    final response = await restOperation.response;
+    print('DELETE call succeeded: ${response.decodeBody()}');
+  } on ApiException catch (e) {
+    print('DELETE call failed: $e');
   }
+}
   ```
 
 

src/fragments/lib-v1/restapi/flutter/fetch.mdx

@@ -5,12 +5,11 @@ To make a GET request use `Amplify.API.get`:
 ```dart
 Future<void> getTodo() async {
   try {
-    const options = RestOptions(path: '/todo');
-    final restOperation = Amplify.API.get(restOptions: options);
+    final restOperation = Amplify.API.get('todo');
     final response = await restOperation.response;
-    print('GET call succeeded: ${response.body}');
+    print('GET call succeeded: ${response.decodeBody()}');
   } on ApiException catch (e) {
-      print('GET call failed: $e');
+    print('GET call failed: $e');
   }
 }
 ```
@@ -56,14 +55,12 @@ Then you can use query parameters in your path as follows:
 ```dart
 Future<void> getTodo() async {
   try {
-    const options = RestOptions(
-        path: '/todo',
-        queryParameters: {'q' : 'test'},
+    final restOperation = Amplify.API.get(
+      'todo',
+      queryParameters: {'q': 'test'},
     );
-    final restOperation = Amplify.API.get(restOptions: options);
     final response = await restOperation.response;
-    print('GET call succeeded');
-    print(response.body);
+    print('GET call succeeded: ${response.decodeBody()}');
   } on ApiException catch (e) {
     print('GET call failed: $e');
   }

src/fragments/lib-v1/restapi/flutter/getting-started/20_installLib.mdx

@@ -2,12 +2,12 @@ Add the following dependencies to your `pubspec.yaml` file and install dependenc
 
 ```yaml
 environment:
-  sdk: ">=2.15.0 <3.0.0"
+  sdk: ">=2.18.0 <4.0.0"
 
 dependencies:
   flutter:
     sdk: flutter
-  amplify_flutter: ^0.6.0
-  amplify_api: ^0.6.0
-  amplify_auth_cognito: ^0.6.0 
+  amplify_flutter: ^1.0.0
+  amplify_api: ^1.0.0
+  amplify_auth_cognito: ^1.0.0
 ```

src/fragments/lib-v1/restapi/flutter/getting-started/40_postTodo.mdx

@@ -1,20 +1,15 @@
 ```dart
-import 'dart:typed_data';
-
 Future<void> postTodo() async {
   try {
-    final options = RestOptions(
-        path: '/todo',
-        body: Uint8List.fromList('{\'name\':\'Mow the lawn\'}'.codeUnits)
-    );
     final restOperation = Amplify.API.post(
-        restOptions: options
+      'todo',
+      body: HttpPayload.json({'name': 'Mow the lawn'}),
     );
     final response = await restOperation.response;
     print('POST call succeeded');
-    print(response.body);
+    print(response.decodeBody());
   } on ApiException catch (e) {
     print('POST call failed: $e');
   }
 }
-```
+```

src/fragments/lib-v1/restapi/flutter/update.mdx

@@ -5,16 +5,15 @@ To update an item via the API endpoint:
 ```dart
 Future<void> updateTodo() async {
   try {
-    final options = RestOptions(
-      path: '/todo/1',
-      body: Uint8List.fromList('{\'name\':\'Mow the lawn\'}'.codeUnits),
+    final restOperation = Amplify.API.put(
+      'todo/1',
+      body: HttpPayload.json({'name': 'Mow the lawn'}),
     );
-    final restOperation = Amplify.API.put(restOptions: options);
     final response = await restOperation.response;
     print('PUT call succeeded');
-    print(response.body);
+    print(response.decodeBody());
   } on ApiException catch (e) {
     print('PUT call failed: $e');
   }
 }
-```
+```