[css-text-3] s/source text/source document/ w3c#3775

Author: fantasai

css-text-3/Overview.bs

@@ -425,7 +425,7 @@ Text Processing</h3>
 
     Note: The 'text-transform' property only affects the presentation layer;
     correct casing for semantic purposes is expected to be encoded
-    in the source text.
+    in the source document.
 
     <wpt>
       text-transform/text-transform-copy-paste-001-manual.html