Change libyaml to 'required' for ruby.

general/prog/ruby.xml

@@ -69,12 +69,16 @@
 
     <bridgehead renderas="sect3">Ruby Dependencies</bridgehead>
 
+    <bridgehead renderas="sect4">Required</bridgehead>
+    <para role="required">
+      <xref linkend="libyaml"/>
+    </para>
+
     <bridgehead renderas="sect4">Optional</bridgehead>
     <para role="optional">
       <xref linkend="db"/>,
       <xref linkend="doxygen"/>,
       <xref linkend="graphviz"/>,
-      <xref linkend="libyaml"/>,
       <xref linkend="tk"/>,
       <xref linkend="valgrind"/>, and
       <ulink url="http://dtrace.org/blogs/about/">DTrace</ulink>

introduction/welcome/changelog.xml

@@ -41,6 +41,10 @@
     <listitem>
       <para>January 29th, 2023</para>
       <itemizedlist>
+        <listitem>
+          <para>[ken] - ruby-3.2.0 requires libyaml. Fixes
+          <ulink url="&blfs-ticket-root;17576">#17576</ulink>.</para>
+        </listitem>
         <listitem>
           <para>[bdubbs] - Update to c-ares-1.19.0. Fixes
           <ulink url="&blfs-ticket-root;17574">#17574</ulink>.</para>