build(deps): bump third_party/abseil-cpp from `68be731` to `8e45685` (#2171)

Bumps [third_party/abseil-cpp](https://github.com/abseil/abseil-cpp) from `68be731` to `8e45685`.
- [Release notes](https://github.com/abseil/abseil-cpp/releases)
- [Commits](https://github.com/abseil/abseil-cpp/compare/68be7315913c8ef8a791a0fb60d98e98787d88b6...8e45685002488b55f24cb67a795eaa8d1c3297a1)

---
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 68be731..8e45685 160000
--- a/third_party/abseil-cpp
+++ b/third_party/abseil-cpp
@@ -1 +1 @@
-Subproject commit 68be7315913c8ef8a791a0fb60d98e98787d88b6
+Subproject commit 8e45685002488b55f24cb67a795eaa8d1c3297a1