spelling correction indicies -> indices

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: Scottan

episodes/07-pandas_essential.md

@@ -326,8 +326,8 @@ answers 2 and 4).
 - CSV data is loaded using the `read_csv()` function to create a pandas `DataFrame` object
 - The `describe()` function gives a quick analysis of the DataFrame
 - `loc[<index>,<column>]` indexes the DataFrame by the index and column labels
-- `iloc[<index>,<column>]` indexes the DataFrame using numerical indicies
-- The data can be sliced by providing index and/or column indicies as ranges or lists of values
+- `iloc[<index>,<column>]` indexes the DataFrame using numerical indices
+- The data can be sliced by providing index and/or column indices as ranges or lists of values
 - The built-in `plot()` function can be used to plot the data using the `matplotlib` library
 
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