PY3 migration - Set py_binary to "PY3" in `python/tpu/profiler`.

PiperOrigin-RevId: 285063566
Change-Id: I80935167e2a281dd4bac6d067d3b9fb2c816578e
diff --git a/tensorflow/python/tpu/profiler/BUILD b/tensorflow/python/tpu/profiler/BUILD
index 157bd93..eb77e5d 100644
--- a/tensorflow/python/tpu/profiler/BUILD
+++ b/tensorflow/python/tpu/profiler/BUILD
@@ -48,7 +48,7 @@
     name = "capture_tpu_profile_bin",
     srcs = ["capture_tpu_profile.py"],
     main = "capture_tpu_profile.py",
-    python_version = "PY2",
+    python_version = "PY3",
     deps = [
         ":capture_tpu_profile_lib",
         "@absl_py//absl/flags",