docs(material/chips): added an example that corresponds to the title of static chips (#28863)

Fixes the documentation example in the Angular Material `chips` component.
Previously the text description of static chips did not match code example

Fixes #28845

(cherry picked from commit 1eb0da7)

Author: lsamboretrorabbit

src/components-examples/material/chips/chips-overview/chips-overview-example.html

@@ -1,6 +1,6 @@
-<mat-chip-listbox aria-label="Fish selection">
-  <mat-chip-option>One fish</mat-chip-option>
-  <mat-chip-option>Two fish</mat-chip-option>
-  <mat-chip-option color="accent" selected>Accent fish</mat-chip-option>
-  <mat-chip-option color="warn">Warn fish</mat-chip-option>
-</mat-chip-listbox>
+<mat-chip-set aria-label="Fish selection">
+  <mat-chip>One fish</mat-chip>
+  <mat-chip>Two fish</mat-chip>
+  <mat-chip>Three fish</mat-chip>
+  <mat-chip disabled>Four fish</mat-chip>
+</mat-chip-set>