fix: url in README #3

Changed files
+2 -2
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README.md
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Before continuing, you must:
-
1. Create a project on [Letta Cloud](https://cloud.letta.com) (or your own Letta instance)
+
1. Create a project on [Letta Cloud](https://app.letta.com) (or your own Letta instance)
2. Have a Bluesky account
3. Have Python 3.8+ installed
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#### 1. Letta Setup
-
- Sign up for [Letta Cloud](https://cloud.letta.com)
+
- Sign up for [Letta Cloud](https://app.letta.com)
- Create a new project
- Note your Project ID and create an API key