Update cone search tutorials

[pllim]

The current tutorial is broken due to astropy/astroquery#1102 causing the URL to be different. xref https://circleci.com/gh/astropy/astropy-tutorials/15

KeyErrorTraceback (most recent call last)
<ipython-input-21-36db4f35e8b6> in <module>()
----> 1 my_favorite_result = all_results['http://vizier.u-strasbg.fr/viz-bin/votable/-A?-out.all&-source=I/220/out&']
      2 print(my_favorite_result.array.data.dtype.names)
      3 print(my_favorite_result.array.data)

KeyError: 'http://vizier.u-strasbg.fr/viz-bin/votable/-A?-out.all&-source=I/220/out&'

Thanks to @adrn for reporting this! You can assign this to me.

[adrn]

Thanks!

[pllim]

Thank YOU!