ci: update test for ci

Author: KazuCocoa

example/ruby/example_sample2.rb

@@ -12,7 +12,7 @@ class ExampleTests < Minitest::Test
       automationName: 'flutter',
       udid: 'emulator-5554',
       deviceName: 'Android',
-      app: "#{Dir.pwd}/../../example/sample2/app-debug.apk",
+      app: "#{Dir.pwd}/example/sample2/app-debug.apk",
       maxRetryCount: 60,
       retryBackoffTime: 10000,
     },