[ci] further debug JAVA_HOME on windows

Author: fangq

.github/workflows/run_test.yml

@@ -37,6 +37,7 @@ jobs:
         run: |
           env | grep JAVA
           octave-cli --version
+          octave-cli --eval "disp(octave_config_info('JAVA_HOME')); disp(octave_config_info('JAVA_LIBS'))"
           octave-cli --eval "disp(usejava('jvm'));addpath(pwd);cd test;run_jsonlab_test"
           octave-cli --eval "addpath(pwd);cd examples; demo_jsonlab_basic; jsonlab_selftest"