chore(deps): update hermetic_cc_toolchain digest to 762c2cb (#3)

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

MODULE.bazel

@@ -64,7 +64,7 @@ bazel_dep(name = "bazel_skylib", version = "1.4.2")
 bazel_dep(name = "hermetic_cc_toolchain", version = "2.0.0")
 git_override(
  module_name="hermetic_cc_toolchain",
- commit = "9f2456cb09fc4be74621e6b84aecae44ce0530d5",
+ commit = "762c2cbf4eef6a15029cf62aebd0efbaf7ee1509",
  remote = "https://github.com/uber/hermetic_cc_toolchain"
 )