Update description for default and bundled gems

Author: hsbt

NEWS.md

@@ -148,6 +148,8 @@ Note: We're only listing outstanding class updates.
 
 ## Stdlib updates
 
+We only list stdlib changes that are notable feature changes.
+
 * RubyGems
     * Add --attestation option to gem push. It enabled to store signature of build artifact to sigstore.dev.
 
@@ -171,6 +173,8 @@ Note: We're only listing outstanding class updates.
     * This library is now extracted from the Ruby repository to [ruby/net-http-sspi].
       [[Feature #20775]]
 
+Other changes are listed in the following sections. we also listed release history from the previous bundled version that is Ruby 3.3.0 if it has GitHub releases.
+
 The following default gem is added.
 
 * win32-registry 0.1.0
@@ -275,8 +279,6 @@ The following bundled gem is added.
 
 The following bundled gems are updated.
 
-Note: we also listed release history from the previous bundled version that is Ruby 3.3.0 if it has GitHub releases.
-
 * minitest 5.25.4
 * power_assert 2.0.4
   * 2.0.3 to [v2.0.4][power_assert-v2.0.4]