This is a Bug Report

Problem:

9 markdown files contain duplicate keys in their YAML frontmatter, violating YAML specification.

Affected files:

1. content/bn/docs/reference/glossary/sidecar-container.md - duplicate full_link key
2. content/en/docs/reference/glossary/sidecar-container.md - duplicate full_link key
3. content/vi/docs/reference/glossary/sidecar-container.md - duplicate full_link key
4. content/zh-cn/docs/reference/glossary/sidecar-container.md - duplicate full_link key
5. content/en/blog/_posts/2018-04-11-migrating-the-kubernetes-blog.md - duplicate date key
6. content/en/blog/_posts/2018-04-24-kubernetes-application-survey-results-2018.md - duplicate date key
7. content/en/blog/_posts/2018-05-04-Announcing-Kubeflow-0-1.md - duplicate author key
8. content/en/blog/_posts/2018-05-05-hugo-migration.md - duplicate author key
9. content/en/blog/_posts/2018-05-17-gardener-the-kubernetes-botanist.md - duplicate author key

Proposed Solution:

Remove duplicate keys from frontmatter. Keep the correct value and delete the redundant entry.