docs: address Copilot review wording (PR #19)

Author: johanrd

docs/rules/template-no-aria-hidden-on-focusable.md

@@ -49,11 +49,13 @@ This rule **allows** the following:
 
 ## Caveats
 
-Component invocations, argument/`this`/path-based tags, and namespace-pathed
-tags are "opaque" — we can't statically know what they render. The descendant
-check skips these branches to avoid false positives. If a component renders a
-focusable element beneath an `aria-hidden` ancestor, the keyboard trap still
-exists at runtime; this rule can't detect it.
+Component invocations, argument/`this`/path-based tags, namespace-pathed tags,
+and hyphenated custom elements (e.g. `<my-element>`) are "opaque" — we can't
+statically know what they render. The descendant check skips these branches
+(via `isNativeElement`, which gates on the HTML/SVG/MathML tag lists and on
+scope references) to avoid false positives. If a component renders a focusable
+element beneath an `aria-hidden` ancestor, the keyboard trap still exists at
+runtime; this rule can't detect it.
 
 Dynamic content inside `{{...}}` mustache statements is similarly not inspected.