Update README.adoc

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

Author: polandll

README.adoc

@@ -37,7 +37,7 @@ ui:
     url: https://github.com/riptano/antora-ui-docs/raw/main/releases/download/v0.8/ui-bundle.zip
 ----
 
-Read on to learn how to customize the UI for your our documentation.
+Read on to learn how to customize the UI for our documentation.
 
 == Developing a new UI bundle