build: set archiveFileName

build.gradle.kts

@@ -14,4 +14,10 @@ repositories {
 dependencies {
     compileOnly("io.papermc.paper:paper-api:1.17.1-R0.1-SNAPSHOT")
     compileOnly("me.clip:placeholderapi:2.11.3")
+}
+
+tasks {
+    shadowJar {
+        archiveFileName.set("PAPI-Expansion-Server-${project.version}.jar")
+    }
 }