Changed package name

Author: ezimuel

composer.json

@@ -1,5 +1,5 @@
 {
-  "name": "elasticsearch/serverless",
+  "name": "elastic/elasticsearch-serverless",
   "description": "PHP Client for Elasticsearch serverless",
   "keywords": [
     "search",
@@ -26,7 +26,8 @@
     "nyholm/psr7": "^1.5",
     "php-http/mock-client": "^1.5",
     "symfony/http-client": "^5.0|^6.0",
-    "php-http/message-factory": "^1.1"
+    "php-http/message-factory": "^1.1",
+    "symfony/yaml": "^5.0"
   },
   "autoload": {
     "psr-4": {