Address PR feedback

Author: andyw8

examples/http_server.rb

@@ -61,7 +61,7 @@ def template(args, server_context:)
   prompts: [ExamplePrompt],
   resources: [
     MCP::Resource.new(
-      uri: "example://test_resource",
+      uri: "https://test_resource.invalid",
       name: "Test resource",
       description: "Test resource that echoes back the uri as its content",
       mime_type: "text/plain",

test/mcp/server_test.rb

@@ -44,7 +44,7 @@ class ServerTest < ActiveSupport::TestCase
       end
 
       @resource = Resource.new(
-        uri: "test://test_resource",
+        uri: "https://test_resource.invalid",
         name: "Test resource",
         description: "Test resource",
         mime_type: "text/plain",