Assign OpenAI PR to Laurent (Azure#24257)

* Assign OpenAI PR to Laurent

* Update pull_request_assignment.yml

Author: lmazuel

.github/pull_request_assignment.yml

@@ -6,6 +6,13 @@
     reviewers:
       - kristapratico
 
+- rule:
+    # OpenAI data-plane PR
+    paths:
+      - "specification/cognitiveservices/data-plane/AzureOpenAI/**"
+    reviewers:
+      - lmazuel
+
 - rule:
     # Cognitive Services - Language pillar data-plane PR
     paths: