Updated installation/index.adoc to fix callout (#168)

* Updated installation/index.adoc to fix callout;
Updated style_guide.adoc to reflect correct callout tag

* Fixed typo per review comment

playbooks/installation/index.adoc

@@ -725,7 +725,7 @@ ansible -i c1-ocp.myorg.com/hosts OSEv3 -a 'subscription-manager attach --pool 8
 ansible -i c1-ocp.myorg.com/hosts OSEv3 -a 'subscription-manager repos --disable "*" --enable rhel-7-server-rpms --enable rhel-7-server-extras-rpms --enable rhel-7-server-ose-3.5-rpms --enable rhel-7-fast-datapath-rpms'
 ----
 
-INFO: The `rhel-7-fast-datapath-rpms` channel is only required for OpenShift Container Platform version 3.5 and later. For versions 3.5 and earlier, this channel should be omitted.
+NOTE: The `rhel-7-fast-datapath-rpms` channel is only required for OpenShift Container Platform version 3.5 and later. For versions 3.4 and earlier, this channel should be omitted.
 
 === Docker Storage Setup
 

style_guide.adoc

@@ -83,10 +83,10 @@ link:/playbooks/installation/installation{outfilesuffix}[click here!]
 The link:/playbooks/installation/load_balancing{outfilesuffix}[External Load Balancers Guide] provides an introduction to the strategies that can be employed within OpenShift
 ----
 +
-3. Use an INFO callout when there's no natural flow.
+3. Use a NOTE callout when there's no natural flow.
 +
 ----
-INFO: The link:/playbooks/installation/load_balancing{outfilesuffix}[External Load Balancers Guide] provides an introduction to the strategies that can be employed within OpenShift
+NOTE: The link:/playbooks/installation/load_balancing{outfilesuffix}[External Load Balancers Guide] provides an introduction to the strategies that can be employed within OpenShift
 ----
 
 === Include a "What's Next?" section to encourage further reading