Fix numpy req for 3.13

requirements/optional.txt

 # xdev availpkg numpy
 # 1.19.2 is the tensorflow minimum
-numpy>=1.26.0  ; python_version < '4.0'  and python_version >= '3.12'    # Python 3.12+
+numpy>=2.1.0   ; python_version < '4.0'  and python_version >= '3.13'    # Python 3.13+
+numpy>=1.26.0  ; python_version < '3.13' and python_version >= '3.12'    # Python 3.12
 numpy>=1.23.2  ; python_version < '3.12' and python_version >= '3.11'    # Python 3.11
 numpy>=1.21.6  ; python_version < '3.11' and python_version >= '3.10'  # Python 3.10
 numpy>=1.19.3  ; python_version < '3.10' and python_version >= '3.9'   # Python 3.9