Update skydoc repo to 8889c43, to fix skydoc #58

As a consequence, Bazel on Windows can now build
//docs/...

See bazelbuild/skydoc#58

Closes #282

PiperOrigin-RevId: 214941694

package.bzl

@@ -122,9 +122,9 @@ def rules_typescript_dev_dependencies():
 
     http_archive(
         name = "io_bazel_skydoc",
-        urls = ["https://github.com/bazelbuild/skydoc/archive/0ef7695c9d70084946a3e99b89ad5a99ede79580.zip"],
-        strip_prefix = "skydoc-0ef7695c9d70084946a3e99b89ad5a99ede79580",
-        sha256 = "491f9e142b870b18a0ec8eb3d66636eeceabe5f0c73025706c86f91a1a2acb4d",
+        url = "https://github.com/bazelbuild/skydoc/archive/8889c43187ca17a0b6e7b05383197811f5aefa17.zip",
+        strip_prefix = "skydoc-8889c43187ca17a0b6e7b05383197811f5aefa17",
+        sha256 = "dbb9034b5a0e98f2bb47ca216ee17e96e79e0d2236f21ce660bf66db0ed44dde",
     )
 
 def _maybe(repo_rule, name, **kwargs):