[build] set java version to 17

.github/workflows/release.yml

@@ -21,11 +21,11 @@ jobs:
       - name: Validate Gradle Wrapper
         uses: gradle/actions/wrapper-validation@v3
 
-      - name: Set up JDK 21
+      - name: Set up JDK 17
         uses: actions/setup-java@v4
         with:
           distribution: 'temurin'
-          java-version: 21
+          java-version: 17
           check-latest: true
 
       - name: Gradle Properties Import.

buildSrc/src/main/kotlin/java-plugin.gradle.kts

@@ -26,14 +26,14 @@ repositories {
 
 java {
     toolchain {
-        languageVersion.set(JavaLanguageVersion.of(21))
+        languageVersion.set(JavaLanguageVersion.of(17))
     }
 }
 
 tasks {
     compileJava {
         options.encoding = Charsets.UTF_8.name()
-        options.release.set(21)
+        options.release.set(17)
     }
 
     javadoc {

gradle/libs.versions.toml

@@ -1,7 +1,7 @@
 [versions]
 # Minecraft
-paper = "1.20.6-R0.1-SNAPSHOT"
-minecraft = "1.20.6"
+paper = "1.20.4-R0.1-SNAPSHOT"
+minecraft = "1.20.4"
 
 # Plugins
 itemsadder = "3.6.3-beta-14"