Add bfill and ffill to the "See Also" section

Co-authored-by: Matthew Roeschke <[email protected]>

Author: sjalkote

Diff for: pandas/core/resample.py

@@ -846,8 +846,8 @@ def interpolate(
         core.resample.Resampler.asfreq: Return the values at the new freq,
             essentially a reindex.
         DataFrame.interpolate: Fill NaN values using an interpolation method.
-        bfill : Backward fill NaN values in the resampled data.
-        ffill : Forward fill NaN values.
+        DataFrame.bfill : Backward fill NaN values in the resampled data.
+        DataFrame.ffill : Forward fill NaN values.
 
         Notes
         -----