OZG-5834 OZG-6134 Change atribute

* From aria-describedby to aria-label

alfa-client/libs/ui/src/lib/ui/mattooltip/mattooltip.directive.ts

@@ -21,8 +21,8 @@
  * Die sprachspezifischen Genehmigungen und Beschränkungen
  * unter der Lizenz sind dem Lizenztext zu entnehmen.
  */
-import { Directive, ElementRef, Input, OnChanges, OnInit } from '@angular/core';
 import { EMPTY_STRING } from '@alfa-client/tech-shared';
+import { Directive, ElementRef, Input, OnChanges, OnInit } from '@angular/core';
 
 /**
  * Workaround: MatTooltipModule aus Angular 13 schafft es nicht immer,
@@ -35,7 +35,7 @@ import { EMPTY_STRING } from '@alfa-client/tech-shared';
  */
 
 const titleAttribute: string = 'title';
-const ariaDescribedBy: string = 'aria-describedby';
+const ariaLabel: string = 'aria-label';
 
 @Directive({
   selector: '[matTooltip]',
@@ -46,8 +46,9 @@ export class MatTooltipDirective implements OnChanges {
   constructor(private el: ElementRef) {}
 
   ngOnChanges(): void {
+    console.log('changes', this.matTooltip);
     this.el.nativeElement.setAttribute(titleAttribute, this.matTooltip);
-    this.el.nativeElement.setAttribute(ariaDescribedBy, this.matTooltip);
+    this.el.nativeElement.setAttribute(ariaLabel, this.matTooltip);
   }
 }
 
@@ -62,7 +63,7 @@ export class MatTooltipDisabledDirective implements OnInit {
   ngOnInit(): void {
     if (this.matTooltipDisabled) {
       this.el.nativeElement.setAttribute(titleAttribute, EMPTY_STRING);
-      this.el.nativeElement.setAttribute(ariaDescribedBy, EMPTY_STRING);
+      this.el.nativeElement.setAttribute(ariaLabel, EMPTY_STRING);
     }
   }
 }