Update README (#1)

* update installation

* remove performance

Author: jaredmixpanel

README.md

@@ -21,8 +21,11 @@ Mixpanel Session Replay enables you to quickly understand **why** users behave a
 
 ## Installation
 
-1. **Download** the [MixpanelSessionReplay.xcframework.zip](https://www.notion.so/Mixpanel-iOS-Session-Replay-SDK-Beta-10ae0ba9256280cdb6e0f39d594cb344?pvs=21) and unzip it.
-2. **In Xcode**, add the `.xcframework` to your target's **Frameworks, Libraries, and Embedded Content**. Set Embed to **Embed & Sign**.
+Add the Session Replay SDK using Swift Package Manager directly in Xcode:
+
+1. In Xcode, go to **File → Add Package Dependencies...**
+2. Paste the GitHub URL: `https://github.com/mixpanel/mixpanel-ios-session-replay-package`
+3. Follow the prompts to select the latest version and add the package to your project.
 
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