fix(examples): revert boolean→string regression for SDK options in 020-twilio-media-streams-node

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Co-Authored-By: Claude <noreply@anthropic.com>

Author: examples-bot

examples/020-twilio-media-streams-node/src/index.js

@@ -14,8 +14,8 @@ const DEEPGRAM_LIVE_OPTIONS = {
   encoding: 'mulaw',
   sample_rate: 8000,
   channels: 1,
-  smart_format: 'true',
-  interim_results: 'true',
+  smart_format: true,
+  interim_results: true,
   utterance_end_ms: 1000,
 };