Update README.adoc

Co-authored-by: Jamie Gillenwater <[email protected]>

Author: polandll

README.adoc

@@ -173,7 +173,7 @@ If you build a new UI bundle, all the DataStax docs repositories must be updated
 The following steps must be completed in each doc repository:
 
 . Create a PR branch for the work..
-. Update all affected playbooks with an appropriate ui bundle url.
+. Update all affected playbooks with an appropriate UI bundle url.
 . Test if the UI is building correctly with a local build.
 . Get PR approval and merge the PR to the appropriate branch (`main` for most repositories).
 . Rebuild the documentation for all affected playbooks using the scripsi `bsys` command.