Fix phrasing for clarity in the docs.

docs/modules/ROOT/pages/prerequisites.adoc

@@ -6,7 +6,7 @@ Spring Security requires a Java 17 or higher Runtime Environment.
 As Spring Security aims to operate in a self-contained manner, you do not need to place any special configuration files in your Java Runtime Environment.
 In particular, you do not need to configure a special Java Authentication and Authorization Service (JAAS) policy file or place Spring Security in common classpath locations.
 
-Similarly, if you use an EJB Container or Servlet Container, you need not put any special configuration files anywhere nor include Spring Security in a server classloader.
+Similarly, if you use an EJB Container or Servlet Container, you do not need to put any special configuration files anywhere nor include Spring Security in a server classloader.
 All the required files are contained within your application.
 
 This design offers maximum deployment time flexibility, as you can copy your target artifact (be it a JAR, WAR, or EAR) from one system to another and it immediately works.