docs: update README.md (#708)

annoce -> announce

README.md

@@ -38,7 +38,7 @@ This codebase and all models are released under CC-BY-NC-SA-4.0 License. Please
 
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 ## Fish Agent
-We are very excited to annoce that we have made our self-research agent demo open source, you can now try our agent demo online at [demo](https://fish.audio/demo/live) for instant English chat and English and Chinese chat locally by following the [docs](https://speech.fish.audio/start_agent/).
+We are very excited to announce that we have made our self-research agent demo open source, you can now try our agent demo online at [demo](https://fish.audio/demo/live) for instant English chat and English and Chinese chat locally by following the [docs](https://speech.fish.audio/start_agent/).
 
 You should mention that the content is released under a **CC BY-NC-SA 4.0 licence**. And the demo is an early alpha test version, the inference speed needs to be optimised, and there are a lot of bugs waiting to be fixed. If you've found a bug or want to fix it, we'd be very happy to receive an issue or a pull request.