chore(deps): update dependency platforms to v0.0.9

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
platforms	http_archive	patch	0.0.8 -> 0.0.9

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Release Notes

bazelbuild/platforms (platforms)

v0.0.9

Compare Source

What's Changed

• Define constraint for emscripten os by @​googlewalt in https://github.com/bazelbuild/platforms/pull/84
• Implement local_config_platform in @platforms by @​Wyverald in https://github.com/bazelbuild/platforms/pull/86

WORKSPACE setup

load("@​bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
http_archive(
    name = "platforms",
    urls = [
        "https://mirror.bazel.build/github.com/bazelbuild/platforms/releases/download/0.0.9/platforms-0.0.9.tar.gz",
        "https://github.com/bazelbuild/platforms/releases/download/0.0.9/platforms-0.0.9.tar.gz",
    ],
    sha256 = "5eda539c841265031c2f82d8ae7a3a6490bd62176e0c038fc469eabf91f6149b",
)

### To use the new Starlark host platform in @​platforms, also include the following snippet:
load("@​platforms//host:extension.bzl", "host_platform_repo")
host_platform_repo(name = "host_platform")

Full Changelog: bazelbuild/platforms@0.0.8...0.0.9

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