minor formatting issue in qiskit.execute_function (#9645) (#9648)

* minor formatting issue in qiskit.execute_function

* bullets

---------

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
(cherry picked from commit 13e748a)

Co-authored-by: Luciano Bello <bel@zurich.ibm.com>

qiskit/execute_function.py

@@ -118,23 +118,26 @@ def execute(
 
             #. :class:`qiskit.transpiler.Layout` instance
             #. ``dict``:
-               virtual to physical::
+
+               * virtual to physical::
 
                     {qr[0]: 0,
                      qr[1]: 3,
                      qr[2]: 5}
 
-               physical to virtual::
+               * physical to virtual::
+
                     {0: qr[0],
                      3: qr[1],
                      5: qr[2]}
 
-            #. ``list``
-               virtual to physical::
+            #. ``list``:
+
+               * virtual to physical::
 
                     [0, 3, 5]  # virtual qubits are ordered (in addition to named)
 
-               physical to virtual::
+               * physical to virtual::
 
                     [qr[0], None, None, qr[1], None, qr[2]]