Update templates/dart/pubspec.yaml.twig

Co-authored-by: Damodar Lohani <[email protected]>

Author: 2002Bishwajeet

templates/dart/pubspec.yaml.twig

@@ -8,7 +8,7 @@ documentation: {{ spec.contactURL }}
 environment:
   sdk: '>=2.17.0 <3.0.0'
 dependencies:
-  http: '>=0.13.5 <1.0.1'
+  http: '>=0.13.6 <1.0.1'
 
 dev_dependencies:
   lints: ^2.0.1