Update entrypoint.sh - escape blanks in a path

[ffischer1984]

it works fine on my machine (windows with wsl2) but on the azure-cloud I get this error:

cp: cannot stat '/geoserver_data/data/security/role/geonode REST role service/config.xml': No such file or directory

think it comes from the non-escaped blanks in the folder: 'geonode REST role service' so please merge