Bump edition number.

daobrien · daobrien · commit d6958cc6b78d · 2020-07-10T14:43:28.000+10:00
diff --git a/en-US/Book_Info.xml b/en-US/Book_Info.xml
@@ -7,7 +7,7 @@
 	<title>Conventions for Writers and Editors</title>
 	 <productname>The Red Hat Style Guide</productname>
 	 <productnumber></productnumber>
-	 <edition>3</edition>
+	 <edition>4</edition>
 	 <pubsnumber>1</pubsnumber>
 	 <abstract>
 		<para>
