PAPIProxyBridge 1.6 fixes bugs and adds support for Folia as well as Fabric 1.20.6

• Added support for Folia, courtesy of @Yomamaeatstoes (#112)
• Added support for Fabric 1.20.5/6 @alexdev03 (#118)
• Added a retry system for failed placeholder passes to reduce the rate of failed placeholder handshakes
• General code cleanup, including improvements to version reporting

Please note: Java 21 is required for Fabric and Minecraft 1.20.6+; otherwise Java 17 is the minimum supported JDK version.

To update, just drag+drop.