Fix usage of platforms in android_ndk docs.

@bazel_tools//platforms is obsolete.

PiperOrigin-RevId: 471522639
Change-Id: I7d58f5e4d6b5554fc39ec2e4c7ffc1a3f7cef73a
diff --git a/site/en/docs/android-ndk.md b/site/en/docs/android-ndk.md
index f0eccad..cbc2cfb 100644
--- a/site/en/docs/android-ndk.md
+++ b/site/en/docs/android-ndk.md
@@ -306,8 +306,8 @@
   name = "aarch64-linux-android-clang8.0.7-libcpp_toolchain",
   toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
   target_compatible_with = [
-      "@bazel_tools//platforms:android",
-      "@bazel_tools//platforms:aarch64"
+      "@platforms//os:android",
+      "@platforms//cpu:aarch64",
   ],
   toolchain = "@androidndk//:aarch64-linux-android-clang8.0.7-libcpp",
 )