fix(srv): fix indentation error in frontmatter (#4542)

Author: SamyOubouaziz

pages/serverless-containers/how-to/manage-a-container.mdx

@@ -7,7 +7,7 @@ content:
   paragraph: Manage your Scaleway Serverless Containers effectively.
 tags: manage container
 dates:
-validation: 2025-02-24
+  validation: 2025-02-24
   posted: 2021-05-26
 categories:
   - serverless