Updates for docstring links

[akeeste]

While combing through our documentation and API, I noticed a few links that should be updated, specifically in mhkit.tidal.io.noaa.request_noaa_data.m

• https://tidesandcurrents.noaa.gov/api/ redirects to https://api.tidesandcurrents.noaa.gov/api/prod/. let's update it to use URL it ultimately redirects to
• https://co-ops.nos.noaa.gov/api/ returns a privacy warning and ultimately redirects to https://api.tidesandcurrents.noaa.gov/api/prod/. let's update it to use URL it ultimately redirects to