Mark additional usage fields as nullable (#1183)

Co-authored-by: ci.datadog-api-spec <[email protected]>

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

.apigentools-info

@@ -4,13 +4,13 @@
     "spec_versions": {
         "v1": {
             "apigentools_version": "1.6.4",
-            "regenerated": "2023-06-08 21:02:41.646586",
-            "spec_repo_commit": "5b401dab"
+            "regenerated": "2023-06-09 14:55:30.884395",
+            "spec_repo_commit": "b6c7aa0b"
         },
         "v2": {
             "apigentools_version": "1.6.4",
-            "regenerated": "2023-06-08 21:02:41.659412",
-            "spec_repo_commit": "5b401dab"
+            "regenerated": "2023-06-09 14:55:30.900828",
+            "spec_repo_commit": "b6c7aa0b"
         }
     }
 }

.generator/schemas/v1/openapi.yaml

@@ -16761,6 +16761,7 @@ components:
         iot_device_count:
           description: The total number of IoT devices during a given hour.
           format: int64
+          nullable: true
           type: integer
         org_name:
           description: The organization name.
@@ -16888,6 +16889,7 @@ components:
         retention:
           description: The retention period in days or "custom" for all custom retention
             usage.
+          nullable: true
           type: string
       type: object
     UsageLogsByRetentionResponse:
@@ -17012,6 +17014,7 @@ components:
         host_count:
           description: Contains the number of active NPM hosts.
           format: int64
+          nullable: true
           type: integer
         hour:
           description: The hour for the usage.