Update bazel_toolchains pin.
Update bazel_toolchains pin.

https://github.com/bazelbuild/bazel-toolchains/issues/216

bazelbuild/rules_nodejs,bazelbuild/rules_nodejs,alexeagle/rules_nodejs,alexeagle/rules_nodejs,alexeagle/rules_nodejs,bazelbuild/rules_nodejs,bazelbuild/rules_nodejs,bazelbuild/rules_nodejs,alexeagle/rules_nodejs