Bumped jumpbox-boshrelease to v4.4.6

This includes the following software updates:

 * esuf v0.1.2
 * genesis v2.6.12
 * cf v6.40.0
 * cloudfoundry-utils v1.0.0
 * safe v0.9.8

manifests/jumpbox.yml

@@ -49,9 +49,9 @@ stemcells:
 
 releases:
 - name:    jumpbox
-  version: 4.4.5
-  url:     https://github.com/cloudfoundry-community/jumpbox-boshrelease/releases/download/v4.4.5/jumpbox-4.4.5.tgz
-  sha1:    f22f5456658405cd46d7dcad9952e6bbdd4da27e
+  version: 4.4.6
+  url:     https://github.com/cloudfoundry-community/jumpbox-boshrelease/releases/download/v4.4.6/jumpbox-4.4.6.tgz
+  sha1:    1352f3ecf5202c1e74c533461675667ddd0dce91
 
 - name:    toolbelt
   version: 3.4.2