Bugfix: Correct the usage statement for Point2Grid

[hsoh-u]

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Describe the Problem

The input of point2grid is a MET point NetCDF, GOES data, and Point observation as NcCF, not a gridded data. The descrioption of "input_filename" should be updated.

bin/point2grid
DEBUG 1: Start point2grid by hsoh(9895) at 2023-08-23 15:48:52Z  cmd: bin/point2grid

*** Model Evaluation Tools (METV11.1.0) ***

Usage: point2grid
        input_filename
        to_grid
        output_filename
        ...
        where   "input_filename" is the gridded data file to be read (required).

User guide is correct.

The input_filename argument indicates the name of the input file to be processed. The input can be a MET NetCDF point observation file generated by other MET tools or a NetCDF AOD dataset from GOES16/17. Python embedding for point observations is also supported, as described in :numref:pyembed-point-obs-data.

Expected Behavior

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2792543 - NOAA Base

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