Fix #162, Update misnamed `CmdHeader` variable in `to_lab_msg.h`

[thnkslprpt]

Checklist

• [x] I reviewed the Contributing Guide.
• [x] I signed and emailed the appropriate Contributor License Agreement to GSFC-SoftwareRelease@mail.nasa.gov and copied cfs-program@lists.nasa.gov.

Describe the contribution

• Fixes #162
  • Renamed the CFE_MSG_CommandHeader_t variable in TO_LAB_NoArgsCmd_t to CmdHeader CommandHeader

Testing performed Tested locally by sending a few commands - all working fine.

Expected behavior changes No change. Avoids potential confusion during future maintenance.

System(s) tested on Debian GNU/Linux 11 (bullseye) Current main branch of cFS bundle.

Contributor Info Avi Weiss @thnkslprpt

[thnkslprpt]

I would like to get these into the next round

Note this should really be CommandHeader to be fully correct ... but what's there now is just obviously wrong

@jphickey Agree - that is more correct - updating now.