Add yum latest to docs and examples

rst/modules.rst

@@ -200,7 +200,7 @@ Will install, upgrade, remove, and list packages with the yum package manager.
 
 *state*:
 
-* Can be either 'installed' or 'removed'
+* Can be either 'installed', 'latest', or 'removed'
 
 *list*:
 

rst/playbooks.rst

@@ -42,8 +42,8 @@ server group, then more commands back on the webservers group, etc::
       user: root
       tasks:
       - include: base.yml somevar=3 othervar=4
-      - name: ensure apache is installed
-        action: yum pkg=httpd state=installed
+      - name: ensure apache is at the latest version
+        action: yum pkg=httpd state=latest
       - name: write the apache config file
         action: template src=/srv/httpd.j2 dest=/etc/httpd.conf
         notify: