Update dependency io.papermc.paper:paper-api to v26

Author: renovate[bot]

core/build.gradle.kts

@@ -37,7 +37,7 @@ dependencies {
     compileOnly("com.github.mqzn:Lotus:1.6.0")
     compileOnly("org.bstats:bstats-bukkit:3.1.0")
     compileOnly("me.clip:placeholderapi:2.12.1")
-    compileOnly("io.papermc.paper:paper-api:1.20.2-R0.1-SNAPSHOT")
+    compileOnly("io.papermc.paper:paper-api:26.1.2.build.63-stable")
     compileOnly("org.mineskin:java-client:3.0.6")
     compileOnly("org.mineskin:java-client-jsoup:3.0.6")
     compileOnly("dev.velix:imperat-bukkit:1.9.7")