Add CPython 3.13.0a3 (#2885)

plugins/python-build/share/python-build/3.13.0a2 → plugins/python-build/share/python-build/3.13.0a3

@@ -3,7 +3,7 @@ export PYTHON_BUILD_CONFIGURE_WITH_OPENSSL=1
 install_package "openssl-3.1.2" "https://www.openssl.org/source/openssl-3.1.2.tar.gz#a0ce69b8b97ea6a35b96875235aa453b966ba3cba8af2de23657d8b6767d6539" mac_openssl --if has_broken_mac_openssl
 install_package "readline-8.2" "https://ftpmirror.gnu.org/readline/readline-8.2.tar.gz#3feb7171f16a84ee82ca18a36d7b9be109a52c04f492a053331d7d1095007c35" mac_readline --if has_broken_mac_readline
 if has_tar_xz_support; then
-    install_package "Python-3.13.0a2" "https://www.python.org/ftp/python/3.13.0/Python-3.13.0a2.tar.xz#b6d46b44190c4c02421eb69a042d16b0c55481bdda818c6c416dc244113a9c2d" standard verify_py313 copy_python_gdb ensurepip
+    install_package "Python-3.13.0a3" "https://www.python.org/ftp/python/3.13.0/Python-3.13.0a3.tar.xz#20784c8304eb1c69c80f966ebdf0775be2e37e23df3b62461eec12a85dcf7ead" standard verify_py313 copy_python_gdb ensurepip
 else
-    install_package "Python-3.13.0a2" "https://www.python.org/ftp/python/3.13.0/Python-3.13.0a2.tgz#9a3c363589ec882f2d1ff008f29f66231ccb552366dd9d8041a65c7e799cbafd" standard verify_py313 copy_python_gdb ensurepip
+    install_package "Python-3.13.0a3" "https://www.python.org/ftp/python/3.13.0/Python-3.13.0a3.tgz#9c7c2b42a20127816f9403723bfc88d1566f47dac0c46f50492f7ff8db646d8f" standard verify_py313 copy_python_gdb ensurepip
 fi