Update arango/collection.py

Co-authored-by: Anthony Mahanna <[email protected]>

arango/collection.py

@@ -1266,7 +1266,7 @@ def add_index(self, data: Json, formatter: bool = False) -> Result[Json]:
         .. note::
 
             As the `add_index` method was made available starting with driver
-            version 8, we have decided to depreciate the other `add_*_index`
+            version 8, we have decided to deprecate the other `add_*_index`
             methods, making this the official way to create indexes. While
             the other methods still work, we recommend using this one instead.
             Note that the other methods would use a formatter by default,