Update gRPC version

This commit updates gRPC to bring some bug fixes to internal repo.
Nothing too special.

[-Wno-unreachable-code-return] is added because upstream third_party
code now needs it

Test: CQ
Bug: None

Change-Id: Ice0c88e70fc8b3838f50e4cefe89beac100b993b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3281545
Reviewed-by: Albert Chaulk <[email protected]>
Commit-Queue: Ming-Chuan Lin <[email protected]>
Cr-Commit-Position: refs/heads/main@{#942495}
diff --git a/DEPS b/DEPS
index 031ff53..f7cbbd1 100644
--- a/DEPS
+++ b/DEPS
@@ -1085,7 +1085,7 @@
     Var('chromium_git') + '/external/github.com/google/gemmlowp.git' + '@' + '13d57703abca3005d97b19df1f2db731607a7dc2',
 
   'src/third_party/grpc/src': {
-      'url': Var('chromium_git') + '/external/github.com/grpc/grpc.git' + '@' + '1777ddf3c344f110323a625d75ff87c5ebc8d789',
+      'url': Var('chromium_git') + '/external/github.com/grpc/grpc.git' + '@' + 'da47e8823754d12f1dd643bc911e80703b557ade',
   },
 
   'src/third_party/freetype/src':