Fix the tile_map doctest which has different output on Windows in the GMT Legacy Tests (#3353)

Author: seisman

pygmt/datasets/tile_map.py

@@ -122,7 +122,7 @@ def load_tile_map(
       * band         (band) uint8 ... 1 2 3
       * y            (y) float64 ... -7.081e-10 -7.858e+04 ... -1.996e+07 -2.004e+07
       * x            (x) float64 ... -2.004e+07 -1.996e+07 ... 1.996e+07 2.004e+07
-        spatial_ref  int64 ... 0
+        spatial_ref  int... 0
     >>> # CRS is set only if rioxarray is available
     >>> if hasattr(raster, "rio"):
     ...     raster.rio.crs