Revise contributor names in 3.15 release notes

Updated contributor list for JIT improvements.

Author: Sacul0457

Doc/whatsnew/3.15.rst

@@ -1358,7 +1358,7 @@ The JIT avoids :term:`reference count`\ s where possible. This generally
 reduces the cost of most operations in Python.
 
 (Contributed by Ken Jin, Donghee Na, Zheao Li, Hai Zhu, Savannah Ostrowski,
-Reiden Ong, Noam Cohen, Tomas Roun, PuQing, and Cajetan Rodrigues in :gh:`134584`.)
+Reiden Ong, Noam Cohen, Tomas Roun, PuQing, Cajetan Rodrigues, and Sacul in :gh:`134584`.)
 
 .. rubric:: Better machine code generation