docs: Update documentation for FRU_Master.json
docs: Update documentation for FRU_Master.json

Signed-off-by: Tom Joseph <ccebe3ea0dc9f732d049c731e46285897e145ffb@in.ibm.com>
Change-Id: I0e9dba265e00f54342bd6e228f7b013135e6eb90

openbmc/pldm,openbmc/pldm,openbmc/pldm