DOC: Use a different image in the draping surface tutorial

[seisman]

Recently, the docs building has been failing frequently (xref: https://github.com/GenericMappingTools/pygmt/actions/workflows/ci_docs.yml):

    Unexpected failing examples (1):
    
        ../examples/tutorials/advanced/draping_on_3d_surface.py failed leaving traceback:
    
        Traceback (most recent call last):
          File "/home/runner/work/pygmt/pygmt/examples/tutorials/advanced/draping_on_3d_surface.py", line 102, in <module>
            with rasterio.open(url_to_image) as dataset:
                 ~~~~~~~~~~~~~^^^^^^^^^^^^^^
          File "/home/runner/micromamba/envs/pygmt/lib/python3.14/site-packages/rasterio/env.py", line 464, in wrapper
            return f(*args, **kwds)
          File "/home/runner/micromamba/envs/pygmt/lib/python3.14/site-packages/rasterio/__init__.py", line 367, in open
            dataset = DatasetReader(path, driver=driver, sharing=sharing, thread_safe=thread_safe, **kwargs)
          File "rasterio/_base.pyx", line 329, in rasterio._base.DatasetBase.__init__
        rasterio.errors.RasterioIOError: HTTP response code: 429

It seems the 1000ppx image used by this example no longer exists, and is redirected to another resolution, which causes the 429 (Too many requests) error. This PR replaces it with the 1024px image instead.

[weiji14]

Seems like the new image is also producing a 429 error? Should we just copy that PNG file and put it on the GMT server cache, similar to https://github.com/GenericMappingTools/gmtserver-admin/blob/master/cache/euflag.nc?

[seisman]

Sounds good.

[seisman]

Seems like the new image is also producing a 429 error?

It appears the 429 error occurs less frequently with the new image.

[yvonnefroehlich]

Seems like the new image is also producing a 429 error?

It appears the 429 error occurs less frequently with the new image.

For me, running this tutorial works for the 1024px image, but fails for the 1000px image ("RasterioIOError: HTTP response code: 429").