Fix typo in docstring example (#56833)

Fix typo in docstring

The words "upsample" and "downsample" were switched.

Author: alfredocarella

pandas/core/resample.py

@@ -1039,15 +1039,15 @@ def interpolate(
         2023-03-01 07:00:04    3
         Freq: s, dtype: int64
 
-        Upsample the dataframe to 0.5Hz by providing the period time of 2s.
+        Downsample the dataframe to 0.5Hz by providing the period time of 2s.
 
         >>> series.resample("2s").interpolate("linear")
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         2023-03-01 07:00:02    2
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         Freq: 2s, dtype: int64
 
-        Downsample the dataframe to 2Hz by providing the period time of 500ms.
+        Upsample the dataframe to 2Hz by providing the period time of 500ms.
 
         >>> series.resample("500ms").interpolate("linear")
         2023-03-01 07:00:00.000    1.0