bash: Update jjb version in jjb-sandbox-env function

- The version of jjb deployed in jenkins.fd.io was
  upgraded to 3.5.0. Make the sandbox setup function
  use the same version.

Type: fix

Signed-off-by: Dave Wallace <dwallacelf@gmail.com>
Change-Id: I486faffc6b5a0cce7425dd526adf9dbc034b2d85

extras/bash/functions.bash

@@ -230,7 +230,7 @@ jjb-sandbox-env()
        && python3 -m venv $VENV_DIR \
        && source $VENV_DIR/bin/activate \
        && pip3 install wheel \
-       && pip3 install jenkins-job-builder==3.0.2
+       && pip3 install jenkins-job-builder==3.5.0
 
     alias jjsb='jenkins-jobs --conf $JENKINS_INI'
     function jjsb-test() {