Second Korean l10n work for release-1.14 (#13970)

* Update outdated files in dev-1.14-ko.2 partly (#13879)

* Update outdated files in dev-1.14-ko.2 partly-concepts-contribute-ref (#13890)

* ko: update dev-1.14-ko.2 for docs/tutorials/configuration/configure-redis-using-configmap.md #13738 (#13891)

* Ko trans: translate contribute/participating.md in Korean (#13812)

* Update outdated files of setup and tasks in dev-1.14-ko.2 partly (#13893)

* ko-trans: Fix typo in install-minikube (#13894)

* ko: Add tutorials/stateful-application/zookeeper #12452 (#13523)

* ko: Add tutorials/services/source-ip #12457 (#13524)

Co-authored-by:    Yoon <learder@gmail.com>
Co-authored-by:    June Yi <june.yi@samsung.com>
Co-authored-by:    Seokho <shsongist@gmail.com>

content/ko/case-studies/pinterest/index.html

@@ -45,8 +45,8 @@ quote: >
 
 </section>
 <div class="banner2" style="text-align:center">
-    <iframe width="500" height="260" src="https://www.youtube.com/embed/I36NNJH1xQY" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
-    <div class="banner2text"><br><br>
+  <iframe width="500" height="260" src="https://www.youtube.com/embed/I36NNJH1xQY" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
+  <div class="banner2text"><br><br>
 "So far it’s been good, especially the elasticity around how we can configure our Jenkins workloads on that Kubernetes shared cluster. That is the win we&nbsp;were&nbsp;pushing&nbsp;for." <span style="font-size:14px;letter-spacing:0.12em;padding-top:20px;text-transform:uppercase;line-height:14px"><br><br>— Micheal Benedict, Product Manager for the Cloud and the Data Infrastructure Group at Pinterest</span>
 
   </div>