Update develop-ref after #1835.

[JohnHalleyGotway]

Pull Request Testing

Update develop-ref after PR #1835 for issue #1817. This bugfix corrects point2grid output which modifies/corrects output in produced by the unit tests in the develop branch.

• Describe testing already performed for these changes:
  
  The NB for develop failed on 20210706 with the modified output.
  kiowa:/d1/projects/MET/MET_regression/develop/NB20210706/test_regression_20210706.log

COMPARING point2grid/point2grid_2D_time_west_bering_sea.nc
file1: MET-develop-ref/test_output/point2grid/point2grid_2D_time_west_bering_sea.nc
file2: MET-develop/test_output/point2grid/point2grid_2D_time_west_bering_sea.nc
ERROR: found  5421 differences in var brightness_temperature_4micron         - max abs: 26.39667 

• Recommend testing for the reviewer(s) to perform, including the location of input datasets, and any additional instructions:
  
  No additional testing needed.

• Do these changes include sufficient documentation updates, ensuring that no errors or warnings exist in the build of the documentation? [Yes]
  This PR serves as documentation of the change.

• Do these changes include sufficient testing updates? [Yes]

• Will this PR result in changes to the test suite? [Yes]
  
  If yes, describe the new output and/or changes to the existing output:
  
  As described above.

• Please complete this pull request review by [07/06/21].
  

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[jprestop]

I see that this PR serves as documentation of the change and that no additional testing is necessary. I approve this request.