Update README.md

Author: waydabber

README.md

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 <p>Custom Resolutions, XDR/HDR Extra Brightness, Virtual Screens, Picture in Picture, Soft-Disconnect, Configuration and EDID overrides, DDC Control, Color Mode Selection, Syncing, Layout Protection and More!</p>
 <a href="https://github.com/waydabber/BetterDisplay/releases/download/v3.2.1/BetterDisplay-v3.2.1.dmg"><img src="https://user-images.githubusercontent.com/37590873/219133640-8b7a0179-20a7-4e02-8887-fbbd2eaad64b.png" width="180" alt="Download for macOS"/></a><br/>
 <sub><b>The <a href="https://github.com/waydabber/BetterDisplay/releases">latest app version</a> requires macOS Ventura, Sonoma or Sequoia.<br>
-Legacy versions: </b>macOS Monterey - <a href="https://github.com/waydabber/BetterDisplay/releases/download/v2.3.9/BetterDisplay-v2.3.9.dmg">v2.3.9</a>. Mojave, Catalina, Big Sur - <a href="https://github.com/waydabber/BetterDisplay/releases/download/v1.4.15/BetterDisplay-v1.4.15.dmg">v1.4.15</a></sub>
+Legacy versions: </b>macOS Monterey - <a href="https://github.com/waydabber/BetterDisplay/releases/download/v2.3.9/BetterDisplay-v2.3.9.dmg">v2.3.9</a>, Mojave, Catalina, Big Sur - <a href="https://github.com/waydabber/BetterDisplay/releases/download/v1.4.15/BetterDisplay-v1.4.15.dmg">v1.4.15</a>.</sub>
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