chore(deps): update com_grail_bazel_toolchain digest to c217c03 (#58)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

WORKSPACE.bazel

@@ -40,9 +40,9 @@ hedron_compile_commands_setup()
 
 http_archive(
     name = "com_grail_bazel_toolchain",
-    sha256 = "4a7bcc50ac3acb1cc546e82a8ca143c6d027fe329003b459a48c05ed556e5546",
-    strip_prefix = "bazel-toolchain-9d8cc8a49842d770b9812b8feed1857a6e27a0b2",
-    url = "https://github.com/grailbio/bazel-toolchain/archive/9d8cc8a49842d770b9812b8feed1857a6e27a0b2.zip",
+    sha256 = "c53acf847fb52198758635490c5e987aacc7c64a5731a4027824762ba4e3f961",
+    strip_prefix = "bazel-toolchain-c217c03479717279035906273702b8bc3309bbb4",
+    url = "https://github.com/grailbio/bazel-toolchain/archive/c217c03479717279035906273702b8bc3309bbb4.zip",
 )
 
 load("@com_grail_bazel_toolchain//toolchain:deps.bzl", "bazel_toolchain_dependencies")