highlight mandatory arguments in load message

easybuild/easyconfigs/f/Fiji/Fiji-2.14.0-Java-11.eb

@@ -44,6 +44,9 @@ modloadmsg = """
 Additional plugins can be installed in your $HOME/.plugins folder or requested to user support
 Use ImageJ/Fiji in headless mode in your scripts with the command `ImageJ-linux64 --headless`
 More information at https://imagej.net/Headless
+Also for Fiji 2.14.0 the arguments `--default-gc --java-home "$EBROOTJAVA/lib/server/"`
+should always be used when running `ImageJ-linux64` commands to avoid errors like:
+`Could not load Java library` and `Unrecognized option: -Xincgc`.
 """
 
 moduleclass = 'vis'