Disable nakayoshi_fork by default in examples

What does this MR do?

Keep these lines consistent with what we currently have in Omnibus/Helm/GDK repos:
e.g. omnibus-gitlab!494 (merged)

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content

Availability and Testing

N/A - just example files

Security

N/A