Build with Java 21 and the latest EA version

.github/workflows/build.yml

@@ -1,7 +1,4 @@
-# Github action performing the following operations:
-# - Define an environment variable STOREPASS=password
-# - Build the Maven project with Java 8, Java 11 and Java 17 as a matrix. The JDK is provided by Temurin
-# - As a post build step, run the tests and upload test coverage to Coveralls.
+# Github action building the project with different versions of Java and uploading the test coverage to Coveralls.
 
 name: build
 
@@ -20,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java: [ 8, 11, 17 ]
+        java: [ 8, 11, 17, 21 ]
 
     steps:
       - uses: actions/checkout@v3
@@ -53,11 +50,11 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - name: Set up Java 20
-        uses: actions/setup-java@v3
+      - name: 'Set up Java EA'
+        uses: oracle-actions/setup-java@v1
         with:
-          java-version: 20
-          distribution: 'temurin'
+          website: jdk.java.net
+          release: EA
           cache: 'maven'          
 
       - name: Build