Make import/export version docs clearer

doc/user/project/settings/import_export.md

@@ -44,6 +44,8 @@ Note the following:
 
 ## Version history
 
+### 13.0+
+
 Starting with GitLab 13.0, GitLab can import bundles that were exported from a different GitLab deployment.
 This ability is limited to two previous GitLab [minor](../../../policy/maintenance.md#versioning)
 releases, which is similar to our process for [Security Releases](../../../policy/maintenance.md#security-releases).
@@ -61,7 +63,7 @@ Prior to 13.0 this was a defined compatibility table:
 
 | Exporting GitLab version   | Importing GitLab version   |
 | -------------------------- | -------------------------- |
-| 11.7 to 13.0               | 11.7 to 13.0               |
+| 11.7 to 12.10              | 11.7 to 12.10              |
 | 11.1 to 11.6               | 11.1 to 11.6               |
 | 10.8 to 11.0               | 10.8 to 11.0               |
 | 10.4 to 10.7               | 10.4 to 10.7               |