[css-anchor-position-1] Update changes list

Author: fantasai

css-anchor-position-1/Overview.bs

@@ -2620,12 +2620,25 @@ Significant changes since the <a href="https://www.w3.org/TR/2025/WD-css-anchor-
 	due to the ill-considered HTML UA default stylesheet rules for popovers.
 	Also drop the <css>dialog</css> alignment value which was the previous attempt to address this problem.
 	(<a href="https://github.com/w3c/csswg-drafts/issues/10258">Issue 10258</a>)
+* Add ''position-anchor/none'' value to 'position-anchor'
+	and make it the initial value to avoid switching all absolutely positioned boxes that have an [=implicit anchor element=]
+	to using the [=scrollable containing block=].
+	Note the initial value may change again, as the discussion is still open...
+	(<a href="https://github.com/w3c/csswg-drafts/issues/13067">Issue 13067</a>)
 * Clarify that ''flip-block'', ''flip-inline'', and ''flip-start'' use the [=writing mode=] of the [=containing block=].
-	(<a href="https://github.com/w3c/csswg-drafts/issues/12869">Issue 12869</a>)
+	(<a href="https://github.com/w3c/csswg-drafts/issues/12869">Issue 12869</a>,
+	 <a href="https://github.com/w3c/csswg-drafts/issues/13076">Issue 13076</a>)
 * Add 'clip-path' to the list of clipping effects considered for ''anchors-visible''
 	and clarify the timing of its checks.
 	(<a href="https://github.com/w3c/csswg-drafts/issues/12732">Issue 12732</a>)
 * Fix error where base styles were accidentally left out of the [=position options list=].
 	(<a href="https://github.com/w3c/csswg-drafts/issues/12890">Issue 12890</a>)
+* Clarify timing of ''anchors-visible'' checks.
+	(<a href="https://github.com/w3c/csswg-drafts/issues/12732">Issue 12732</a>)
+* Clarify that the ''align-self/normal'' alignment resolution based on the 'position-area' value
+	affects the [=used value=] (which then keys into how overflow is handled per [[CSS-ALIGN-3]]).
+* Fix algorithm error requiring matching tree roots for anchor name matching,
+	since it is sometimes possible to match across shadow tree boundaries.
+	(<a href="https://github.com/w3c/csswg-drafts/issues/12941">Issue 12941</a>)
 
 See also <a href="https://www.w3.org/TR/2025/WD-css-anchor-position-1-20251007/#changes">Previous Changes</a>.