Merge pull request #20013 from thaJeztah/fix-migration-header

Fix Header on migration page

docs/migration.md

@@ -9,7 +9,7 @@ weight=79
 +++
 <![end-metadata]-->
 
-# Migrate to Engine 1.10
+# Migrate to Engine 1.10
 
 Starting from version 1.10 of Docker Engine, we completely change the way image
 data is addressed on disk. Previously, every image and layer used a randomly