doc: Edit the Submitting Changes to Gerrit section.

The edit includes: correcting a previous rebase,
adding bullets for clarity, and other grammar fixes.

Change-Id: I9a6ac616b2eca5f2bab9728ebd8b7e50d3effbe1
Signed-off-by: L.S. Cook <leonax.cook@intel.com>
1 file changed