Fix typo that triggered CI failure

ChangeLog.adoc

@@ -52,10 +52,10 @@ Internal Issues
     specification expresses requirements, fix minor issues, and reorder the
     chapter for increased readability (internal issue 3921).
   * Add missing <feature> tags to several extensions, a `nofeatures`
-    attribute attribute for extensions to explicitly indicate they don't
-    require any features, and added CI to check that every extension either
-    requires at least one feature, or sets the `nofeatures` tag to true
-    (internal issues 3946, 3951).
+    attribute for extensions to explicitly indicate they don't require any
+    features, and added CI to check that every extension either requires at
+    least one feature, or sets the `nofeatures` tag to true (internal issues
+    3946, 3951).
   * Add a NOTE to the VK_EXT_host_image_copy command descriptions that host
     image copy to / from an image is not internally synchronized (internal
     issue 4040).