Roll external/abseil_cpp/ b7c61d35e..0093ac6ca (2 commits) (#6615)

https://github.com/abseil/abseil-cpp/compare/b7c61d35e6c7...0093ac6cac89

Created with:
  roll-dep external/abseil_cpp

Co-authored-by: GitHub Actions[bot] <>
diff --git a/DEPS b/DEPS
index 3a587a4..fdf18f0 100644
--- a/DEPS
+++ b/DEPS
@@ -3,7 +3,7 @@
 vars = {
   'github': 'https://github.com',
 
-  'abseil_revision': 'b7c61d35e6c79875afb4db524443fd0fb20c5ae7',
+  'abseil_revision': '0093ac6cac892086a6d7d09c55421a2a4c2cdb2e',
 
   'effcee_revision': 'ae38e040cbb7e83efa8bfbb4967e5b8c8c89b55a',