Updated Upstream (Paper)

Upstream has released updates that appear to apply and compile correctly

Paper Changes:
PaperMC/Paper@bc0c3d88 Promote build channel to STABLE
PaperMC/Paper@e90c034f Finalize unpick migration (#13463)
PaperMC/Paper@94d0c97a Don't try to save scoreboard if there is no world loaded (#13471)

purpur-server/minecraft-patches/sources/net/minecraft/world/entity/boss/wither/WitherBoss.java.patch

@@ -48,7 +48,7 @@
 -                if (!this.isSilent()) {
 +                if (!this.isSilent() && level.purpurConfig.witherPlaySpawnSound) { // Purpur - Toggle for Wither's spawn sound
                      // CraftBukkit start - Use relative location for far away sounds
-                     // level.globalLevelEvent(1023, this.blockPosition(), 0);
+                     // level.globalLevelEvent(LevelEvent.SOUND_WITHER_BOSS_SPAWN, this.blockPosition(), 0);
                      int viewDistance = level.getCraftServer().getViewDistance() * 16;
 @@ -379,8 +_,10 @@
                  }