fix: upgrade base image for CVE patches

Signed-off-by: Andrea Terzolo <andrea.terzolo@suse.com>

Author: Andreagit97

BCI.dockerfile

@@ -1,4 +1,4 @@
-FROM registry.suse.com/bci/bci-micro:15.6 AS final
+FROM registry.suse.com/bci/bci-micro:15.7 AS final
 ARG LONG_ARCH="x86_64"
 ARG SHORT_ARCH="amd64"
 ARG EBPF_SUBFOLDER="x86_64"
@@ -66,4 +66,4 @@ WORKDIR /opt/stackstate-agent/bin/agent
 HEALTHCHECK --interval=2m --timeout=5s --retries=2 \
   CMD ["/probe.sh"]
 
-CMD ["/init-process.sh"]
+CMD ["/init-process.sh"]