fix filegroup

Author: rickeylev

tests/support/cc_toolchains/BUILD.bazel

@@ -26,7 +26,7 @@ filegroup(
     name = "py_header_files",
     srcs = [
         "py_header.h",
-        "py_include/py_header.h",
+        "py_include/py_include.h",
     ],
 )