Resolve #3165249 "Meilisearch private key"

Closes #3165249

config/schema/search_api_meilisearch.schema.yml

@@ -8,9 +8,9 @@ search_api_meilisearch.settings:
     meilisearch_host_port:
       type: text
       label: 'Host port'
-    meilisearch_private_key:
+    meilisearch_master_key:
       type: text
-      label: 'Private key'
+      label: 'Master key'
     meilisearch_id_mappings:
       type: sequence
       label: "Mapping of the drupal items id's to MeiliSearch ids"