Update events intake specs for v2 Events post endpoint (#745)

Co-authored-by: ci.datadog-api-spec <packages@datadoghq.com>

Author: api-clients-generation-pipeline[bot]

.apigentools-info

@@ -4,13 +4,13 @@
     "spec_versions": {
         "v1": {
             "apigentools_version": "1.6.6",
-            "regenerated": "2025-06-25 15:54:04.411969",
-            "spec_repo_commit": "0ec5a2f3"
+            "regenerated": "2025-06-25 17:36:53.162860",
+            "spec_repo_commit": "51c17453"
         },
         "v2": {
             "apigentools_version": "1.6.6",
-            "regenerated": "2025-06-25 15:54:04.430596",
-            "spec_repo_commit": "0ec5a2f3"
+            "regenerated": "2025-06-25 17:36:53.178661",
+            "spec_repo_commit": "51c17453"
         }
     }
 }