Add mixed filterable attributes example (#734)

Author: Strift

.code-samples.meilisearch.yaml

@@ -262,8 +262,17 @@ get_filterable_attributes_1: |-
   $client->index('movies')->getFilterableAttributes();
 update_filterable_attributes_1: |-
   $client->index('movies')->updateFilterableAttributes([
-    'genres',
-    'director'
+    'author',
+    [
+        'attributePatterns' => ['genres'],
+        'features' => [
+            'facetSearch' => true,
+            'filter' => [
+                'equality' => true,
+                'comparison' => false,
+            ],
+        ],
+    ],
   ]);
 reset_filterable_attributes_1: |-
   $client->index('movies')->resetFilterableAttributes();

src/Endpoints/Delegates/HandlesSettings.php

@@ -222,7 +222,7 @@ public function resetSynonyms(): array
     // Settings - Filterable Attributes
 
     /**
-     * @return list<non-empty-string>|list<array{
+     * @return list<non-empty-string|array{
      *     attributePatterns: list<non-empty-string>,
      *     features?: array{
      *         facetSearch: bool,
@@ -236,7 +236,7 @@ public function getFilterableAttributes(): array
     }
 
     /**
-     * @param list<non-empty-string>|list<array{
+     * @param list<non-empty-string|array{
      *   attributePatterns: list<non-empty-string>,
      *   features?: array{facetSearch: bool, filter: array{equality: bool, comparison: bool}}
      * }> $filterableAttributes

tests/Settings/FilterableAttributesTest.php

@@ -55,6 +55,7 @@ public function testUpdateGranularFilterableAttributes(): void
         $index = $this->createEmptyIndex($this->safeIndexName());
 
         $expectedAttributes = [
+            'author',
             [
                 'attributePatterns' => ['title'],
                 'features' => [