adding in referencing to null for certain attributes (#348)

Co-authored-by: lauraintercom <laura.owens@intercom.io>

Author: lauraintercom

descriptions/0/api.intercom.io.yaml

@@ -15841,6 +15841,7 @@ components:
       properties:
         source_type:
           type: string
+          nullable: true
           description: The type of the source that triggered AI Agent involvement
             in the conversation.
           enum:
@@ -18162,6 +18163,7 @@ components:
           example: '274'
         name:
           type: string
+          nullable: true
           description: The name of the author
           example: Operator
         email:

descriptions/2.10/api.intercom.io.yaml

@@ -13101,6 +13101,7 @@ components:
           example: '274'
         name:
           type: string
+          nullable: true
           description: The name of the author
           example: Operator
         email:

descriptions/2.11/api.intercom.io.yaml

@@ -11407,6 +11407,7 @@ components:
       properties:
         source_type:
           type: string
+          nullable: true
           description: The type of the source that triggered AI Agent involvement
             in the conversation.
           enum:
@@ -13866,6 +13867,7 @@ components:
           example: '274'
         name:
           type: string
+          nullable: true
           description: The name of the author
           example: Operator
         email:

descriptions/2.12/api.intercom.io.yaml

@@ -12091,6 +12091,7 @@ components:
       properties:
         source_type:
           type: string
+          nullable: true
           description: The type of the source that triggered AI Agent involvement
             in the conversation.
           enum:
@@ -14141,6 +14142,7 @@ components:
           example: '274'
         name:
           type: string
+          nullable: true
           description: The name of the author
           example: Operator
         email:

descriptions/2.13/api.intercom.io.yaml

@@ -13437,6 +13437,7 @@ components:
       properties:
         source_type:
           type: string
+          nullable: true
           description: The type of the source that triggered AI Agent involvement
             in the conversation.
           enum:
@@ -15578,6 +15579,7 @@ components:
           example: '274'
         name:
           type: string
+          nullable: true
           description: The name of the author
           example: Operator
         email:

descriptions/2.14/api.intercom.io.yaml

@@ -14719,6 +14719,7 @@ components:
       properties:
         source_type:
           type: string
+          nullable: true
           description: The type of the source that triggered AI Agent involvement
             in the conversation.
           enum:
@@ -16959,6 +16960,7 @@ components:
           example: '274'
         name:
           type: string
+          nullable: true
           description: The name of the author
           example: Operator
         email:

descriptions/2.7/api.intercom.io.yaml

@@ -11237,6 +11237,7 @@ components:
           example: '274'
         name:
           type: string
+          nullable: true
           description: The name of the author
           example: Operator
         email:

descriptions/2.8/api.intercom.io.yaml

@@ -11261,6 +11261,7 @@ components:
           example: '274'
         name:
           type: string
+          nullable: true
           description: The name of the author
           example: Operator
         email:

descriptions/2.9/api.intercom.io.yaml

@@ -12429,6 +12429,7 @@ components:
           example: '274'
         name:
           type: string
+          nullable: true
           description: The name of the author
           example: Operator
         email: