Fix <type> to </type> in Maven section of guides

Fix typo in maven dependiecs of some of the the guides
Cutting and pasting the maven dependecies from the guides was failing
due to an xml element that was not closed.

Fixes gh-211

docs/src/docs/asciidoc/guides/httpsession-xml.adoc

@@ -21,7 +21,7 @@ If you are using Maven, ensure to add the following dependencies:
 		<groupId>org.springframework.session</groupId>
 		<artifactId>spring-session-data-redis</artifactId>
 		<version>{spring-session-version}</version>
-		<type>pom<type>
+		<type>pom</type>
 	</dependency>
 	<dependency>
 		<groupId>org.springframework</groupId>

docs/src/docs/asciidoc/guides/httpsession.adoc

@@ -21,7 +21,7 @@ If you are using Maven, ensure to add the following dependencies:
 		<groupId>org.springframework.session</groupId>
 		<artifactId>spring-session-data-redis</artifactId>
 		<version>{spring-session-version}</version>
-		<type>pom<type>
+		<type>pom</type>
 	</dependency>
 	<dependency>
 		<groupId>org.springframework</groupId>

docs/src/docs/asciidoc/guides/rest.adoc

@@ -21,7 +21,7 @@ If you are using Maven, ensure to add the following dependencies:
 		<groupId>org.springframework.session</groupId>
 		<artifactId>spring-session-data-redis</artifactId>
 		<version>{spring-session-version}</version>
-		<type>pom<type>
+		<type>pom</type>
 	</dependency>
 	<dependency>
 		<groupId>org.springframework</groupId>

docs/src/docs/asciidoc/guides/security.adoc

@@ -22,7 +22,7 @@ If you are using Maven, ensure to add the following dependencies:
 	<groupId>org.springframework.session</groupId>
 	<artifactId>spring-session-data-redis</artifactId>
 	<version>{spring-session-version}</version>
-	<type>pom<type>
+	<type>pom</type>
 	</dependency>
 	<dependency>
 	<groupId>org.springframework</groupId>