feat(deps): upgrade deepgram-sdk to v6.0.0-rc.1

Fern-generated SDK with unchanged API surface (listen.v1.media,
speak.v1.audio, read.v1.text). No code changes required.

Author: lukeocodes

deepgram.toml

@@ -6,7 +6,7 @@ repository = "https://github.com/deepgram-starters/flask-text-to-speech"
 useCase = "text-to-speech"
 language = "python"
 framework = "flask"
-sdk = "5.3.2"
+sdk = "6.0.0-rc.1"
 tags = ["text-to-speech", "tts", "speech-synthesis", "python", "flask"]
 
 # Check prerequisites

requirements.txt

@@ -1,4 +1,4 @@
-deepgram-sdk==5.3.2
+deepgram-sdk==6.0.0rc1
 flask==3.1.0
 flask-cors==5.0.0
 PyJWT==2.10.1