[FIX] Fix typo in WithStorageDirective documentation (#1578)

diff --git a/server/apps/distributed-app/docs/modules/ROOT/partials/WithStorageDirective.adoc b/server/apps/distributed-app/docs/modules/ROOT/partials/WithStorageDirective.adoc
index 6b5f9b9..e013f03 100644
--- a/server/apps/distributed-app/docs/modules/ROOT/partials/WithStorageDirective.adoc
+++ b/server/apps/distributed-app/docs/modules/ROOT/partials/WithStorageDirective.adoc
@@ -19,7 +19,7 @@
     <targetFolderName>Spam</targetFolderName>
     <seen>true</seen>
     <important>true</important>
-    <keywords>keyword1,keyword2</targetFolderName>
+    <keywords>keyword1,keyword2</keywords>
 </mailet>
 ....
 
@@ -30,6 +30,6 @@
   <targetFolderNames>Important, INBOX</targetFolderNames>
   <seen>true</seen>
   <important>true</important>
-  <keywords>keyword1,keyword2</targetFolderName>
+  <keywords>keyword1,keyword2</keywords>
 </mailet>
 ....
\ No newline at end of file
diff --git a/server/mailet/mailets/src/main/java/org/apache/james/transport/mailets/WithStorageDirective.java b/server/mailet/mailets/src/main/java/org/apache/james/transport/mailets/WithStorageDirective.java
index e9a79f4..23883fa 100644
--- a/server/mailet/mailets/src/main/java/org/apache/james/transport/mailets/WithStorageDirective.java
+++ b/server/mailet/mailets/src/main/java/org/apache/james/transport/mailets/WithStorageDirective.java
@@ -58,7 +58,7 @@
  *      <targetFolderName>Spam</targetFolderName>
  *      <seen>true</seen>
  *      <important>true</important>
- *      <keywords>keyword1,keyword2</targetFolderName>
+ *      <keywords>keyword1,keyword2</keywords>
  *  </mailet>
  *
  *  Alternatively, several target folders can be specified:
@@ -67,7 +67,7 @@
  *    <targetFolderNames>Important, INBOX</targetFolderNames>
  *    <seen>true</seen>
  *    <important>true</important>
- *    <keywords>keyword1,keyword2</targetFolderName>
+ *    <keywords>keyword1,keyword2</keywords>
  *  </mailet>
  *
  */