Run required checks and align Java release validation

Co-authored-by: Codex <noreply@openai.com>

Author: rcosta358

.github/workflows/publish.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Setup Java
         uses: actions/setup-java@v4
         with:
-          java-version: 20
+          java-version: 21
           distribution: temurin
 
       - name: Setup Node.js

.github/workflows/test.yml

@@ -16,7 +16,6 @@ permissions:
 jobs:
   checks:
     name: Checks
-    if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
     runs-on: ubuntu-latest
 
     defaults:

server/pom.xml

@@ -36,10 +36,6 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>${pVersion.compiler}</version>
-                <configuration>
-					<source>20</source>
-					<target>20</target>
-				</configuration>
             </plugin>
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
@@ -102,8 +98,7 @@
     <properties>
         <lsp4j.version>0.24.0</lsp4j.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<maven.compiler.source>20</maven.compiler.source>
-		<maven.compiler.target>20</maven.compiler.target>
+		<maven.compiler.release>20</maven.compiler.release>
 		<!-- versions -->
 		<version.memcompiler>1.3.0</version.memcompiler>
 		<version.spoon>10.4.2</version.spoon>