Merge pull request redhat-documentation#433 from mportman12/December-…

…whats-new

added December What's New

supplementary_style_guide/introduction/whats-new.adoc

@@ -29,6 +29,19 @@ To view the history of changes from 2020 through 2022, see the link:https://gith
 // .Other updates
 // * TODO
 
+[[december-2023]]
+== December 2023
+.Glossary entries
+* xref:ibm-cloud[IBM Cloud®]: Added glossary entry
+* look up: Removed glossary entry because guidance already exists in the _Merriam-Webster Dictionary_
+* look-up: Removed glossary entry because guidance already exists in the _Merriam-Webster Dictionary_
+* lookup: Removed glossary entry because guidance already exists in the _Merriam-Webster Dictionary_
+* xref:now[now]: Updated glossary entry to "use with caution"
+* xref:previously[previously]: Added glossary entry
+
+.Style guidance
+* xref:ip-addresses-and-mac-addresses[IP addresses and MAC addresses]: Added examples of reserved IP addresses and MAC addresses
+
 [[november-2023]]
 == November 2023