fix typo in README [skip ci]

diff --git a/README.adoc b/README.adoc
index e449283..fd03757 100644 (file)
--- a/README.adoc
+++ b/README.adoc
@@ -42,7 +42,7 @@ NOTE: The `snapshot` flag tells Antora to fetch the UI when the `--fetch` comman
 This setting is required because updates to the UI bundle are pushed to the same URL.
 If the URL were to be unique, this setting would not be required.
 
-Read on to learn how to custom the default UI for your own documentation.
+Read on to learn how to customize the default UI for your own documentation.
 
 == Development Quickstart