DOC: add double backticks for sphinx compatibility

Co-authored-by: mroeschke <mroeschke@users.noreply.github.com>

Author: tuhinsharma121

pandas/core/indexes/range.py

@@ -351,14 +351,14 @@ def step(self) -> int:
         """
         The value of the `step` parameter (``1`` if this was not supplied).
 
-        The `step` parameter determines the increment (or decrement in the case
-        of negative values) between consecutive elements in the `RangeIndex`.
+        The ``step`` parameter determines the increment (or decrement in the case
+        of negative values) between consecutive elements in the ``RangeIndex``.
 
         See Also
         --------
         RangeIndex : Immutable index implementing a range-based index.
-        RangeIndex.stop : Returns the stop value of the `RangeIndex`.
-        RangeIndex.start : Returns the start value of the `RangeIndex`.
+        RangeIndex.stop : Returns the stop value of the RangeIndex.
+        RangeIndex.start : Returns the start value of the RangeIndex.
 
         Examples
         --------