docs(jenkins): fix Jenkins installation info (#157)

Co-authored-by: brian-armory <53799971+brian-armory@users.noreply.github.com>

content/en/docs/guides/tutorials/codelabs/hello-deployment/index.md

@@ -26,14 +26,16 @@ image. Spinnaker expects all applications to be deployed as deb packages.
 
 If you already have a Jenkins server, you can skip this step.
 
+In the event you run into issues with these example commands, refer to the instructions at http://pkg.jenkins-ci.org/debian/ for updated commands.
+
 SSH into your instance and run the following:
 
 ```
 sudo apt-get update
 sudo apt-get upgrade
 sudo apt-get install openjdk-8-jdk
-wget -q -O - https://jenkins-ci.org/debian/jenkins-ci.org.key | sudo apt-key add -
-sudo sh -c 'echo deb http://pkg.jenkins-ci.org/debian binary/ > /etc/apt/sources.list.d/jenkins.list'
+wget -q -O - https://pkg.jenkins.io/debian/jenkins.io.key | sudo apt-key add -
+sudo sh -c 'echo deb https://pkg.jenkins.io/debian binary/ > /etc/apt/sources.list.d/jenkins.list'
 sudo apt-get update
 sudo apt-get install jenkins git
 ```
@@ -89,6 +91,7 @@ Next edit the properties of your bucket and turn on static website hosting.
 
 We will now install deb-s3 on our Jenkins server.
 
+
 Log in to your Jenkins user (you may need to add it to your sudoers file) and install Ruby and
 bundler: