test: fix expected test value after changing audio token allowance

ref: N25B-209

test/unit/agents/transcription/test_speech_recognizer.py

@@ -5,12 +5,13 @@ from control_backend.agents.transcription.speech_recognizer import OpenAIWhisper
 
 
 def test_estimate_max_tokens():
-    """Inputting one minute of audio, assuming 300 words per minute, expecting 400 tokens."""
+    """Inputting one minute of audio, assuming 450 words per minute and adding a 10 token padding,
+    expecting 610 tokens."""
     audio = np.empty(shape=(60 * 16_000), dtype=np.float32)
 
     actual = SpeechRecognizer._estimate_max_tokens(audio)
 
-    assert actual == 400
+    assert actual == 610
     assert isinstance(actual, int)