docs(api): update transcript endpoint to return text/plain with attachment example

Author: AAnkudovich

descriptions/0/api.intercom.io.yaml

@@ -11151,21 +11151,31 @@ paths:
       - Calls
       operationId: showCallTranscript
       description: |
-        Returns the transcript for the specified call. If no transcript exists, an array with a single empty object is returned: `[{}]`.
+        Returns the transcript for the specified call as a downloadable text file.
       responses:
         '200':
           description: successful
+          headers:
+            Content-Disposition:
+              description: File attachment directive and suggested filename for the transcript
+              schema:
+                type: string
+                example: "attachment; filename=transcription_data-2025-07-17.txt"
           content:
-            application/json:
-              examples:
-                no_transcript:
-                  value:
-                    - {}
+            text/plain:
               schema:
-                type: array
-                items:
-                  type: object
-                  additionalProperties: true
+                type: string
+                description: Transcript text
+              examples:
+                transcript_txt:
+                  value: |-
+                    [00:00:03] Fin: "Howdy, this is Artem bot. How can I assist you today?"
+                    [00:00:09] User: "Could you give me a description of Blue-Eyes White Dragon, please?"
+                    [00:00:15] Fin: "The Blue-Eyes White Dragon is known for its high attack power of three thousand and defense of two thousand five hundred, making it one of the strongest normal monsters early on.
+
+                    Would you like to hear more information about it?"
+                    [00:00:30] User: "Ah no, could you send me up to a human now please?"
+                    [00:00:35] Fin: "Our team will get back to you as soon as they can. Feel free to share more details before you hang up. Thank you for calling, and sorry I couldn't assist further."
         '404':
           description: Not Found
           content: