PEP 703: typo fix, "with with" -> "with" (#3456)

Author: antont

peps/pep-0703.rst

@@ -1767,7 +1767,7 @@ an open issue, but a possible path might look like the following:
    CPython, one with the GIL and one without.  Extension authors
    target both ABIs.
 #. After 2--3 releases, (i.e., in 2026--2027), CPython is released
-   with with the GIL controlled by a runtime environment variable or
+   with the GIL controlled by a runtime environment variable or
    flag. The GIL is enabled by default.  There is only a single ABI.
 #. After another 2--3 release (i.e., 2028--2030), CPython switches to
    the GIL being disabled by default.  The GIL can still be enabled