build(deps): bump third_party/abseil-cpp from `564372f` to `c1e1b47` (#2359)

Bumps [third_party/abseil-cpp](https://github.com/abseil/abseil-cpp) from `564372f` to `c1e1b47`.
- [Release notes](https://github.com/abseil/abseil-cpp/releases)
- [Commits](https://github.com/abseil/abseil-cpp/compare/564372fcd6d8c76e6faca5317d94b70c1d069ddb...c1e1b47d989978cde8c5a2a219df425b785a0c47)

---
updated-dependencies:
- dependency-name: third_party/abseil-cpp
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/third_party/abseil-cpp b/third_party/abseil-cpp
index 564372f..c1e1b47 160000
--- a/third_party/abseil-cpp
+++ b/third_party/abseil-cpp
@@ -1 +1 @@
-Subproject commit 564372fcd6d8c76e6faca5317d94b70c1d069ddb
+Subproject commit c1e1b47d989978cde8c5a2a219df425b785a0c47