Roll external/abseil_cpp/ 48bf10f14..a5e3599b2 (2 commits) (#6421)

https://github.com/abseil/abseil-cpp/compare/48bf10f14296...a5e3599b234f

Created with:
  roll-dep external/abseil_cpp

Co-authored-by: GitHub Actions[bot] <>
diff --git a/DEPS b/DEPS
index 8e41267..928b33c 100644
--- a/DEPS
+++ b/DEPS
@@ -3,7 +3,7 @@
 vars = {
   'github': 'https://github.com',
 
-  'abseil_revision': '48bf10f1429628cc2bf8d7cd122a003f322a5a04',
+  'abseil_revision': 'a5e3599b234ff11cb6e7e52a77fd4811a24a851a',
 
   'effcee_revision': '514b52ec61609744d7e587d93a7ef9b60407ab45',