[css-conditional-4] Explicitly note the arguments are identical

Author: svgeesus

css-conditional-4/Overview.bs

@@ -111,12 +111,20 @@ when the text and layout processing engine ingesting
 this CSS text is capable of utilising the specified [[css-fonts-4#font-technology-definitions]]
 in layout and rendering.
 
+Note: the allowed values for the font-technology function
+are the same as those for the technology function
+in the '@font-face' '@font-face/src' descriptor.
+
 A CSS processor is considered to
 <dfn export for=CSS id="dfn-support-font-format">support a font format</dfn>
 when the text and layout processing engine ingesting
 this CSS text is capable of utilising the specified [[css-fonts-4#font-format-definitions]]
 in layout and rendering.
 
+Note: the allowed values for the font-format function
+are the same as those for the format function
+in the '@font-face' '@font-face/src' descriptor.
+
 <h2 id="when-rule">Generalized Conditional Rules: the ''@when'' rule</h2>
 
 The <dfn>@when</dfn> at-rule is a <a>conditional group rule</a>