Update README.md

README.md

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 <h3>BetterDisplay</h3>
 <p>Custom Resolutions, XDR/HDR Extra Brightness, Virtual Screens, Picture in Picture, Display Disconnect, Display and EDID overrides & More!<p>
-<a href="https://github.com/waydabber/BetterDisplay/releases/download/v2.2.6/BetterDisplay-v2.2.6.dmg"><img src="https://user-images.githubusercontent.com/37590873/219133640-8b7a0179-20a7-4e02-8887-fbbd2eaad64b.png" width="150" alt="Download for macOS"/></a><br/>
+<a href="https://github.com/waydabber/BetterDisplay/releases/download/v2.3.0/BetterDisplay-v2.3.0b.dmg"><img src="https://user-images.githubusercontent.com/37590873/219133640-8b7a0179-20a7-4e02-8887-fbbd2eaad64b.png" width="150" alt="Download for macOS"/></a><br/>
 <sub>Not on macOS Monterey or newer? Get the <a href="https://github.com/waydabber/BetterDisplay/releases/download/v1.4.15/BetterDisplay-v1.4.15.dmg">v1.x version</a> (macOS Mojave and up)!</sub>
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 - [Reach the full brightness potential of your XDR or HDR display](https://github.com/waydabber/BetterDisplay/wiki/XDR-and-HDR-brightness-upscaling) - XDR brightness upscale to 1600 nits, external HDR display brightness upscale depending on the display's capability. Native XDR, color table (Apple Silicon) and Metal (Apple Silicon and Intel) methods are all supported. *
 - [Native brightness upscaling for Apple XDR displays](https://github.com/waydabber/BetterDisplay/wiki/XDR-and-HDR-brightness-upscaling#enablingdisabling-hardware-native-xdr-upscaling-apple-silicon-intel-requires-apple-xdr-display) (built-in) - provides full unlock for the entire brightness range with no strings attached - no clipped or overblown HDR videos, full native sliders compatibility, no extra CPU/GPU usage. *
+- Display group and synchronization features - sync brightness and other image controls among multiple displays!
 - Change the display's brightness, volume and colors via software and hardware (DDC) control using sliders, native or custom keyboard shortcuts!
 - BetterDisplay is the only app currently with DDC control for all modern Macs (full DDC support for all Apple Silicon Macs including the M1 built-in HDMI ports, and 2018 mini built-in HDMI port).
 - Change display inputs using DDC on supported displays.