Update playbooks intro documentation URL

lamp_simple/roles/common/handlers/main.yml

@@ -1,6 +1,6 @@
 ---
 # Handler to handle common notifications. Handlers are called by other plays.
-# See http://docs.ansible.com/playbooks_intro.html for more information about handlers.
+# See https://docs.ansible.com/ansible/latest/user_guide/playbooks_intro.html for more information about handlers.
 
 - name: restart ntp
   service:

lamp_simple/roles/web/handlers/main.yml

@@ -1,6 +1,6 @@
 ---
 # Handler for the webtier: handlers are called by other plays.
-# See http://docs.ansible.com/playbooks_intro.html for more information about handlers.
+# See https://docs.ansible.com/ansible/latest/user_guide/playbooks_intro.html for more information about handlers.
 
 - name: restart iptables
   service:

lamp_simple_rhel7/roles/common/handlers/main.yml

@@ -1,6 +1,6 @@
 ---
 # Handler to handle common notifications. Handlers are called by other plays.
-# See http://docs.ansible.com/playbooks_intro.html for more information about handlers.
+# See https://docs.ansible.com/ansible/latest/user_guide/playbooks_intro.html for more information about handlers.
 
 - name: restart ntp
   service: name=ntpd state=restarted