Map migration corrections

[tsaucier-sf]

1. The Map migrations page is not linked correctly and goes to a broken page.

• Navigate to https://sourcefuse.github.io/arc-docs/
• Expand ARC IaC
• Expand Reference Architectures
• Select MAP Migrations

2. The bullet lists are misaligned and need to be corrected.

Fixing the issue with Item # 1:

• Omit .md on this line: https://github.com/sourcefuse/arc-docs/blob/main/docs/arc-iac-docs/.pages.yml#L74