fix(jump-links): add aria-label to nav landmark

Closes #2860

Assisted-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: bennypowers

.changeset/fix-jump-links-nav.md

@@ -0,0 +1,7 @@
+---
+"@patternfly/elements": patch
+---
+
+`pf-jump-links`: the shadow root `<nav>` element now has a default
+`aria-label` of "Page section navigation". Set the `label` attribute
+to customize it.

elements/pf-jump-links/pf-jump-links.ts

@@ -84,7 +84,7 @@ export class PfJumpLinks extends LitElement {
 
   render(): TemplateResult<1> {
     return html`
-      <nav id="container">${this.expandable ? html`
+      <nav id="container" aria-label="${this.label || 'Page section navigation'}">${this.expandable ? html`
         <details ?open="${this.expanded}" @toggle="${this.#onToggle}">
           <summary>
             <pf-icon icon="chevron-right"></pf-icon>