Merge branch 'main' into llastflowers/6497/data-component-ADR-part-2

Author: llastflowers

.changeset/clever-geckos-sleep.md

@@ -0,0 +1,5 @@
+---
+'@primer/react': patch
+---
+
+Defer `useAnchoredPosition` initial mount setState from useLayoutEffect to useEffect when overlay is closed, eliminating unnecessary cascading re-renders that block paint.

.changeset/cold-lions-listen.md

@@ -17,7 +17,7 @@
     "@types/react": "^18.3.11",
     "@types/react-dom": "^18.3.0",
     "@vitejs/plugin-react": "^4.3.3",
-    "@primer/react": "38.20.0",
+    "@primer/react": "38.21.0",
     "@primer/styled-react": "1.0.6",
     "styled-components": "5.x",
     "typescript": "^5.9.2",