We use the GD::Graph perl module, not GD::Chart (which doesn't exist)

docs/en/xml/Bugzilla-Guide.xml

@@ -45,7 +45,7 @@
 <!ENTITY min-cgi-ver "2.88">
 <!-- Optional modules -->
 <!ENTITY min-gd-ver "1.20">
-<!ENTITY min-gd-chart-ver "any">
+<!ENTITY min-gd-graph-ver "any">
 <!ENTITY min-gd-text-align-ver "any">
 <!ENTITY min-chart-base-ver "0.99c">
 <!ENTITY min-xml-parser-ver "any">

docs/en/xml/installation.xml

@@ -143,8 +143,8 @@
 
     <listitem>
       <para>
-        GD::Chart
-        (&min-gd-chart-ver;) for bug charting
+        GD::Graph
+        (&min-gd-graph-ver;) for bug charting
       </para>
     </listitem>