Update Gradle to 9.8 and Cosmos API to 26.3.build.19-alpha

build.gradle.kts

@@ -26,7 +26,7 @@ tasks {
 }
 
 dependencies {
-    compileOnly("com.alttd.cosmos:cosmos-api:26.2.build.17-stable") {
+    compileOnly("com.alttd.cosmos:cosmos-api:26.3.build.19-alpha") {
         isChanging = true
     }
     compileOnly("de.keyle:mypet-api:4.0.0-SNAPSHOT")
@@ -98,4 +98,4 @@ paper {
             default = BukkitPluginDescription.Permission.Default.FALSE
         }
     }
-}
+}