Fix announceUrl and Polly limits (#317)

Author: Devon-White

api/compatibility-api/_spec_.yaml

@@ -3468,7 +3468,10 @@ paths:
               properties:
                 AnnounceUrl:
                   type: string
-                  description: The URL to send participant announcements to.
+                  description: >- 
+                    The URL to send conference announcements to. 
+                    The `AnnounceUrl` has a maximum length of 60 seconds of audio before timing out.
+                    Additionally, if the `AnnounceUrl` is a `cXML script` using the [`say verb`][/compatibility-api/cxml/voice/say], the url will inherrient the limits of the `say`.
                 AnnounceMethod:
                   type: string
                   enum:
@@ -3915,7 +3918,10 @@ paths:
                     Default is `POST`
                 AnnounceUrl:
                   type: string
-                  description: The URL to send conference announcements to.
+                  description: >- 
+                    The URL to send conference announcements to. 
+                    The `AnnounceUrl` has a maximum length of 60 seconds of audio before timing out.
+                    Additionally, if the `AnnounceUrl` is a `cXML script` using the [`say verb`][/compatibility-api/cxml/voice/say], the url will inherrient the limits of the `say`.
                 Status:
                   type: string
                   description: The status of this conference.

docs/home/calling/voice/tts/index.mdx

@@ -86,6 +86,11 @@ For detailed instructions for each provider, consult the voice ID references lin
 Amazon Web Services' Polly TTS engine includes several models to accommodate different use cases.
 SignalWire supports the Standard and Neural models:
 
+:::warning Amazon Polly limits
+Amazon Polly has a limit of 3000 chargable charactere in a single request.
+If your TTS request is longer than 3000 characters, you will experience silence.
+:::
+
 - [Standard](https://docs.aws.amazon.com/polly/latest/dg/standard-voices.html)
 is a traditional, cost-effective, and reliable TTS model.
 It is less natural-sounding but more budget-friendly than Polly Neural. Example voice identifier string: `polly.Emma`