Merge pull request #33009 from codyhoag/fix-include-guidelines

Fix include statement in doc guidelines

Author: lbarbeevargas

contributing_to_docs/doc_guidelines.adoc

@@ -508,7 +508,7 @@ For example, if you want to embed the link:https://github.com/openshift/installe
 .`01_vnet.json` ARM template
 [source,json]
 ----
-include::https://raw.githubusercontent.com/openshift/installer/release-4.7/upi/azure/01_vnet.json[]
+\include::https://raw.githubusercontent.com/openshift/installer/release-4.7/upi/azure/01_vnet.json[]
 ----
 ```