chore: add tabs examples (#468)

Author: andrewseguin

src/app/shared/documentation-items/documentation-items.ts

@@ -145,7 +145,18 @@ const DOCS: {[key: string]: DocCategory[]} = {
         {id: 'grid-list', name: 'Grid list', examples: ['grid-list-dynamic']},
         {id: 'list', name: 'List', examples: ['list-sections']},
         {id: 'stepper', name: 'Stepper', examples: ['stepper-overview']},
-        {id: 'tabs', name: 'Tabs', examples: ['tabs-template-label']},
+        {id: 'tabs', name: 'Tabs', examples: [
+            'tab-group-basic',
+            'tab-group-custom-label',
+            'tab-group-dynamic-height',
+            'tab-group-dynamic',
+            'tab-group-header-below',
+            'tab-group-lazy-loaded',
+            'tab-group-stretched',
+            'tab-group-theme',
+            'tab-group-async',
+            'tab-nav-bar-basic',
+          ]},
         {id: 'tree', name: 'Tree', examples: [
           'tree-dynamic',
           'tree-flat-overview',