Update 01-upgrading-to-v1.6.md

website/docs/guides/migration/versions/01-upgrading-to-v1.6.md

@@ -18,7 +18,7 @@ dbt Labs is committed to providing backward compatibility for all versions 1.x,
 
 - dbt Core v1.6 does not support Python 3.7, which reached End Of Life on June 23. Support Python versions are 3.8, 3.9, 3.10, and 3.11.
 - As part of the Semantic layer re-launch (in beta), the spec for `metrics` has changed significantly. Migration guide coming soon: https://github.com/dbt-labs/docs.getdbt.com/pull/3705
-- Manifest schema version is now v10, reflecting [TODO] changes
+- The manifest schema version is now v10.
 
 ### For consumers of dbt artifacts (metadata)