update these underlines

source/release-notes/v4.0-release-notes.rst

@@ -188,7 +188,7 @@ the form item or ``false`` to show the form item.
 Responding to ``false`` is new feature in version 4.0.
 
 User Mapping Now Accepts User Identifiers
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 User mapping scripts can now return a UID instead of a username.
 This is particularly useful for centers that have multiple domains where
@@ -206,7 +206,7 @@ See the :ref:`form documentation for form_header <bc_form_header>`
 for more details.
 
 Removed Runtime Dependency on Software Collections
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 OnDemand no longer requires Software Collections, SCL, on RHEL-based systems. 
 OnDemand also no longer has an indirect dependency on the TCL environment module packages.