maintainer-workflow: Fix CLA email recommendation

The recent change to CONTRIBUTING.md made clear the CLA does not need to
go to the public list.  Update the maintainer instructions to match.

Fixes: ce0a0c6 ("Update to Contributing documentation to make starting contributions more clear with respect to the CLA."),
Change-Id: If1fa87d4344832ef8ac978ee4f56361cc7227781
Signed-off-by: Milton Miller <[email protected]>

Author: mdmillerii

maintainer-workflow.md

@@ -10,7 +10,7 @@ listed on an existing CCLA (corporate).
 email to [email protected] with a request to be added.
   * If a CLA for the contributor is found, accept the patch(1).
 * If a CLA is not found, request that the contributor execute one and send it
-to [email protected].org.
+to manager@lfprojects.org.
   * Do not accept the patch(1) until a signed CLA (individual _or_
 corporate) has been uploaded to the CLA repository.
   * The CCLA form can be found [here][2].