Update dependency bazel_toolchains to v3.7.2 (#1773)

Author: renovate-bot

testing/download_pkgs_at_root/WORKSPACE

@@ -45,11 +45,11 @@ http_archive(
 
 http_archive(
     name = "bazel_toolchains",
-    sha256 = "89a053218639b1c5e3589a859bb310e0a402dedbe4ee369560e66026ae5ef1f2",
-    strip_prefix = "bazel-toolchains-3.5.0",
+    sha256 = "1caf8584434d3e31be674067996be787cfa511fda2a0f05811131b588886477f",
+    strip_prefix = "bazel-toolchains-3.7.2",
     urls = [
-        "https://github.com/bazelbuild/bazel-toolchains/archive/3.5.0.tar.gz",
-        "https://mirror.bazel.build/github.com/bazelbuild/bazel-toolchains/archive/3.5.0.tar.gz",
+        "https://github.com/bazelbuild/bazel-toolchains/archive/3.7.2.tar.gz",
+        "https://mirror.bazel.build/github.com/bazelbuild/bazel-toolchains/archive/3.7.2.tar.gz",
     ],
 )