Merge branch 'exp-698-task-custom-metadata' of github.com:meilisearch/documentation into exp-698-task-custom-metadata

Author: guimachiavelli

snippets/samples/code_samples_get_documents_1.mdx

@@ -13,7 +13,10 @@ client.index('movies').getDocuments({
 ```
 
 ```python Python
-client.index('movies').get_documents({'limit':2, 'filter': 'genres=action'})
+client.index('movies').get_documents({
+  'limit':2, 'filter': 'genres=action',
+  'sort': ['rating:desc', 'release_date:asc']  # list format
+})
 ```
 
 ```php PHP

snippets/samples/code_samples_get_documents_post_1.mdx

@@ -23,7 +23,8 @@ client.index('books').getDocuments({
 client.index('books').get_documents({
   'limit':3,
   'fields': ['title', 'genres', 'rating', 'language'],
-  'filter': '(rating > 3 AND (genres=Adventure OR genres=Fiction)) AND language=English'
+  'filter': '(rating > 3 AND (genres=Adventure OR genres=Fiction)) AND language=English',
+  'sort': 'rating:desc, title:asc'  # comma-separated string format
 })
 ```