Update example sdk version

example/pubspec.lock

@@ -393,7 +393,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "3.2.2-alpha"
+    version: "3.2.4-alpha"
   yaml:
     dependency: transitive
     description:

example/pubspec.yaml

@@ -18,7 +18,7 @@ publish_to: "none" # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
+  sdk: ">=2.17.0 <3.0.0"
 
 dependencies:
   xterm: