Fix doc generation

For some reason the documentation worked locally with 973a18d but does not
on CI.

spring-boot-docs/pom.xml

@@ -620,6 +620,11 @@
 			<artifactId>spring-data-jpa</artifactId>
 			<optional>true</optional>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework.data</groupId>
+			<artifactId>spring-data-ldap</artifactId>
+			<optional>true</optional>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework.data</groupId>
 			<artifactId>spring-data-mongodb</artifactId>