Adjust plugin JAR name.

.gitlab-ci.yml

@@ -14,4 +14,4 @@ build:
       - .gradle
   artifacts:
     paths:
-      - "**/build/libs/*.jar"
+      - "**/build/libs/*-plugin.jar"

build.gradle.kts

@@ -1,3 +1,5 @@
+import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
+
 plugins {
   java
   id("org.jetbrains.kotlin.jvm") version "1.6.10" apply false
@@ -51,4 +53,8 @@ subprojects {
       expand(props)
     }
   }
+
+  tasks.withType<ShadowJar> {
+    archiveClassifier.set("plugin")
+  }
 }