Add a NEWS entry.

ericsnowcurrently · ericsnowcurrently · commit 289d0508738a · 2023-05-06T14:40:20.000-06:00
diff --git a/Misc/NEWS.d/next/Core and Builtins/2023-05-05-12-14-47.gh-issue-99113.-RAdnv.rst b/Misc/NEWS.d/next/Core and Builtins/2023-05-05-12-14-47.gh-issue-99113.-RAdnv.rst
@@ -0,0 +1,6 @@
+The GIL is now (optionally) per-interpreter.  This is the fundamental change
+for PEP 684.  This is all made possible by virtue of the isolated state of
+each interpreter in the process.  The behavior of the main interpreter
+remains unchanged.  Likewise, interpreters created using
+``Py_NewInterpreter()`` are not affected.  To get an interpreter with its
+own GIL, call ``Py_NewInterpreterFromConfig()``.
