Upgrade wagon-ssh to 3.4.2; align maven-site-plugin

Upgrade wagon-ssh to 3.4.2 in all pom files, thus align
maven-site-plugin versions to 3.9.1 across as well, consistently.

Change-Id: I38f7a6ded3517d1b116169dee1c12deb86eed3a1
Signed-off-by: Marco Miller <marco.miller@ericsson.com>
diff --git a/org.eclipse.jgit.benchmarks/pom.xml b/org.eclipse.jgit.benchmarks/pom.xml
index d2e7f00..4ff5bfb 100644
--- a/org.eclipse.jgit.benchmarks/pom.xml
+++ b/org.eclipse.jgit.benchmarks/pom.xml
@@ -157,12 +157,12 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-site-plugin</artifactId>
-          <version>3.8.2</version>
+          <version>3.9.1</version>
           <dependencies>
             <dependency><!-- add support for ssh/scp -->
               <groupId>org.apache.maven.wagon</groupId>
               <artifactId>wagon-ssh</artifactId>
-              <version>3.3.4</version>
+              <version>3.4.2</version>
             </dependency>
           </dependencies>
         </plugin>
diff --git a/org.eclipse.jgit.packaging/pom.xml b/org.eclipse.jgit.packaging/pom.xml
index 6c77a55..26b27e1 100644
--- a/org.eclipse.jgit.packaging/pom.xml
+++ b/org.eclipse.jgit.packaging/pom.xml
@@ -318,7 +318,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-site-plugin</artifactId>
-          <version>3.8.2</version>
+          <version>3.9.1</version>
         </plugin>
       </plugins>
     </pluginManagement>
diff --git a/pom.xml b/pom.xml
index 4b579b5..f31ac43 100644
--- a/pom.xml
+++ b/pom.xml
@@ -347,7 +347,7 @@
             <dependency><!-- add support for ssh/scp -->
               <groupId>org.apache.maven.wagon</groupId>
               <artifactId>wagon-ssh</artifactId>
-              <version>3.4.0</version>
+              <version>3.4.2</version>
             </dependency>
           </dependencies>
         </plugin>