zephyr.yml: fix cache keys used on zephyr-cache job
The keys did not match those used by the .zephyr job, making cache useless.
Signed-off-by: Zygmunt Krynicki zygmunt.krynicki@huawei.com
The keys did not match those used by the .zephyr job, making cache useless.
Signed-off-by: Zygmunt Krynicki zygmunt.krynicki@huawei.com