v0.39.1

Most important changes:
cace4c8 Revert "neonvm-kernel: Switch to version 6.12.8 (#1193)"

Smaller changes:
99bf327 Specify namespace so secret is applied in the right place (#1202)
58e4746 makefile: autodetect target arch for builds (#1197)
0f36d50 Give multus a non expiring token (#1201)