correct long_name for tracer_dfy for passive tracers when diag_form == 1

[klindsay28]

No description provided.

[codecov]

Codecov Report

Merging #1513 (4012505) into dev-gfdl-main-candidate-2021-10-04 (4d3d10e) will not change coverage.
The diff coverage is n/a.

@@                         Coverage Diff                         @@
##           dev-gfdl-main-candidate-2021-10-04    #1513   +/-   ##
===================================================================
  Coverage                               29.06%   29.06%           
===================================================================
  Files                                     237      237           
  Lines                                   71643    71643           
===================================================================
  Hits                                    20823    20823           
  Misses                                  50820    50820           

Impacted Files	Coverage Δ
src/tracer/MOM_tracer_registry.F90	63.02% <ø> (ø)

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