Add javadoc:javadoc Maven command

Author: sbesson

.github/workflows/maven.yml

@@ -17,7 +17,7 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
     runs-on: ${{ matrix.os }}
     env:
-      maven_commands: test # default is install
+      maven_commands: test javadoc:javadoc # default is install
     steps:
       - uses: actions/checkout@v4
       - name: Set up JDK ${{ matrix.java }}