fix: update minimum required versions (#1474)

Author: fdalcin

README.md

@@ -15,7 +15,7 @@ This theme is named after Canadian media theorist Marshall McLuhan, who coined t
 ## Requirements
 
 * PHP >= 8.3
-* WordPress >= 6.9.1
+* WordPress >= 7.0.4
 * Pressbooks >= 6.36.3
 
 ## Installation

phpcs.ruleset.xml

@@ -17,5 +17,5 @@
     </rule>
 	<!-- Run against the PHPCompatibility ruleset -->
 	<rule ref="PHPCompatibility"/>
-	<config name="testVersion" value="8.1-8.2"/>
+	<config name="testVersion" value="8.3-8.4"/>
 </ruleset>