Add ednote to Text appearance guideline (#562)

* Add ednote to Text appearance guideline

* Slight tweaks to wording

---------

Co-authored-by: Julie Rawe <70166481+julierawe@users.noreply.github.com>
Co-authored-by: Kevin White <kevin@w3.org>

Author: 3 people

guidelines/groups/text-and-wording/text-appearance.md

@@ -14,3 +14,14 @@ children:
 ---
 
 Users can read visually rendered :term[text].
+
+:::ednote
+AGWG remains committed to providing Text Appearance guidance for multiple
+scripts and/or languages. To support our internationalization goals, AGWG is exploring
+ways to:
+
+- not require WCAG 3 to be republished when metrics are added for more scripts/languages,
+- make script/language-specific metrics normative,
+- meet the needs of different scripts and languages by allowing flexibility in which metrics are required and in their values, and
+- preserve backward compatibility.
+:::