chore(deps): update dependency bazel_skylib to v1.9.0

Author: renovate[bot]

MODULE.bazel

@@ -2,7 +2,7 @@
 module(name = "toolchains_cc")
 
 bazel_dep(name = "rules_cc", version = "0.2.8")
-bazel_dep(name = "bazel_skylib", version = "1.8.1")
+bazel_dep(name = "bazel_skylib", version = "1.9.0")
 bazel_dep(name = "platforms", version = "1.0.0")
 
 # TODO: improve this explanation