Use real manylinux_2_39_riscv64 for riscv64 in tests

Author: kxxt

tests/pypi/whl_target_platforms/whl_target_platforms_tests.bzl

@@ -102,9 +102,9 @@ def _can_parse_existing_tags(env):
         "manylinux2014_i686": 1,
         "manylinux2014_ppc64": 1,
         "manylinux2014_ppc64le": 1,
-        "manylinux2014_riscv64": 1,
         "manylinux2014_s390x": 1,
         "manylinux2014_x86_64": 1,
+        "manylinux_2_39_riscv64": 1,
         "manylinux_11_12_aarch64": 1,
         "manylinux_11_12_armv7l": 1,
         "manylinux_11_12_i686": 1,