fix(Prepare_XXXX_Extrapolation_Data_Fn): Depth was mislabeled

[kellijohnson-NOAA]

Depth column should be BEST_DEPTH_M to work with match_strata_fn(). Using cbind resulted in the column being labeled Depth as it was extracted. Now, using data.frame the column is named with the correct label.

[James-Thorson-NOAA]

Thanks for raising this topic -- I'm not confident that all extrapolation-grids will play well with match_strata_fn, which was originally designed just for the NWFSC usage. I'll start an email thread to work out how to proceed.

[James-Thorson-NOAA]

OK, we've discussed and I'll add this edit to the development branch, and close the issue here to avoid duplication.