Make num_flex_logs_retention_days nullable

.generator/schemas/v1/openapi.yaml

@@ -6107,6 +6107,7 @@ components:
             The available values depend on retention plans specified in your organization's contract/subscriptions.
           example: 360
           format: int64
+          nullable: true
           type: integer
         num_retention_days:
           description: |-
@@ -6179,6 +6180,7 @@ components:
             **Note**: Changing this value affects all logs already in this index. It may also affect billing.
           example: 360
           format: int64
+          nullable: true
           type: integer
         num_retention_days:
           description: |-

lib/datadog_api_client/v1/models/logs_index.rb

@@ -94,6 +94,14 @@ def self.openapi_types
       }
     end
 
+    # List of attributes with nullable: true
+    # @!visibility private
+    def self.openapi_nullable
+      Set.new([
+        :'num_flex_logs_retention_days',
+      ])
+    end
+
     # Initializes the object
     # @param attributes [Hash] Model attributes in the form of hash
     # @!visibility private

lib/datadog_api_client/v1/models/logs_index_update_request.rb

@@ -94,6 +94,14 @@ def self.openapi_types
       }
     end
 
+    # List of attributes with nullable: true
+    # @!visibility private
+    def self.openapi_nullable
+      Set.new([
+        :'num_flex_logs_retention_days',
+      ])
+    end
+
     # Initializes the object
     # @param attributes [Hash] Model attributes in the form of hash
     # @!visibility private