deps: Bump com_github_google_libprotobuf_mutator -> 1.3

[phlax]

Fix #31861

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[repokitteh-read-only]

CC @envoyproxy/dependency-shepherds: Your approval is needed for changes made to (bazel/.*repos.*\.bzl)|(bazel/dependency_imports\.bzl)|(api/bazel/.*\.bzl)|(.*/requirements\.txt)|(.*\.patch).
envoyproxy/dependency-shepherds assignee is @RyanTheOptimist

🐱

Caused by: #32543 was opened by phlax.

see: more, trace.

[phlax]

external/com_github_google_libprotobuf_mutator/src/field_instance.h:198:21: error: no matching function for call to 'StrCat'
    std::string s = absl::StrCat(*descriptor_);

i think we hit this previously elsewhere - trying to rem the reason

[RyanTheOptimist]

/wait
on CI

[github-actions]

This pull request has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in 7 days if no further activity occurs. Please feel free to give a status update now, ping for review, or re-open when it's ready. Thank you for your contributions!

[github-actions]

This pull request has been automatically closed because it has not had activity in the last 37 days. Please feel free to give a status update now, ping for review, or re-open when it's ready. Thank you for your contributions!