Update ipmitool commit in Dockerfile to 1.8.19

The new version include bug fixes that address issues present in the previous release, leading to a more stable and reliable tool

https://github.com/ipmitool/ipmitool/blob/master/ChangeLog

Signed-off-by: Ignacio Turégano <98024527+turegano-equinix@users.noreply.github.com>

Dockerfile

@@ -11,7 +11,7 @@ FROM alpine:3.8
 LABEL maintainers="https://tinkerbell.org/community/slack/"
 
 ARG IPMITOOL_REPO=https://github.com/ipmitool/ipmitool.git
-ARG IPMITOOL_COMMIT=b5ce925744851b58193ad3ee18957ce88f6efc26
+ARG IPMITOOL_COMMIT=19d78782d795d0cf4ceefe655f616210c9143e62
 ARG GRPC_HEALTH_PROBE_VERSION=v0.3.4
 
 WORKDIR /tmp