fix: update toolchain type to ppc64le from ppc (#3907)

Builds will fail due to the toolchain type not matching on `ppc64le`
without this change. Note that `ppc64le` and `ppc` are different
architectures.

## PR Type

What kind of change does this PR introduce?

- [x] Bugfix

## What is the current behavior?

Builds fail on `ppc64le`.

## What is the new behavior?

They don't fail due to the wrong toolchain type.

## Does this PR introduce a breaking change?

- [ ] Yes
- [x] No

Author: rickystewart

nodejs/private/nodejs_toolchains_repo.bzl

@@ -39,7 +39,7 @@ PLATFORMS = {
     "linux_ppc64le": struct(
         compatible_with = [
             "@platforms//os:linux",
-            "@platforms//cpu:ppc",
+            "@platforms//cpu:ppc64le",
         ],
     ),
     "darwin_amd64": struct(