Update testcontainers/sshd image from 1.3.0 to 1.4.0 (#11843)

Author: mdelapenya

core/src/main/java/org/testcontainers/containers/PortForwardingContainer.java

@@ -24,7 +24,7 @@ public enum PortForwardingContainer {
 
     private static ContainerDef DEFINITION = new ContainerDef() {
         {
-            setImage(DockerImageName.parse("testcontainers/sshd:1.3.0"));
+            setImage(DockerImageName.parse("testcontainers/sshd:1.4.0"));
             addExposedTcpPort(22);
             addEnvVar("PASSWORD", PASSWORD);
         }

docs/features/configuration.md

@@ -52,7 +52,7 @@ Some companies disallow the usage of Docker Hub, but you can override `*.image`
 > **tinyimage.container.image = alpine:3.17**  
 > Used to check whether images can be pulled at startup, and always required (unless [startup checks are disabled](#disabling-the-startup-checks))
 
-> **sshd.container.image = testcontainers/sshd:1.1.0**  
+> **sshd.container.image = testcontainers/sshd:1.4.0**  
 > Required if [exposing host ports to containers](./networking.md#exposing-host-ports-to-the-container)
 
 > **vncrecorder.container.image = testcontainers/vnc-recorder:1.3.0**