Corrected typo

samples/preauth/pom.xml

@@ -7,7 +7,7 @@
     </parent>
     <groupId>org.springframework.security</groupId>
     <artifactId>spring-security-samples-preauth</artifactId>
-    <name>Spring Security - Preauthentiation sample</name>
+    <name>Spring Security - Preauthentication sample</name>
     <packaging>war</packaging>
     <dependencies>
         <dependency>