Updated Upstream (BungeeCord)

Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

BungeeCord Changes:
296b31bd Minecraft 1.21.9 support
8f6768ae Bump version to 1.21-R0.5-SNAPSHOT
70603d54 Release 1.21-R0.4
2e12caad Add central-publishing-maven-plugin
f9ce9fad #3884: Add docs for Plugin#getExecutorService
69b476fc #3881: Optimize ServerUnique Tablist code
d37a430f #3882: Reduce lock boilerplate by using lomboks `@Locked`
4c02676b #3883: Minecraft 1.21.9-rc1 support
a2558484 #3880: Minecraft 1.21.9-pre4 support
97c61672 #3879: Minecraft 1.21.9-pre3 support
c2162eed #3870: Declare some DefinedPacket util methods as static
0124b669 #3874: Add ObjectComponents
7be06f14 #3878: Minecraft 1.21.9-pre2 support
01048b4f Add Java 25 to GitHub Actions
d2a317ee Minecraft 25w37a support
0be632a4 #3875: Minecraft 25w35a support
f27f4fbc Minecraft 25w34b support

Author: linsaftw