Update io_grpc_proto digest to a0e6d67

Author: renovate[bot]

WORKSPACE

@@ -63,9 +63,9 @@ http_archive(
 
 http_archive(
     name = "io_grpc_proto",
-    sha256 = "f081eba5884bf09051d27664aede4fc22bbaa77da477735d745bcef17bd088f1",
-    strip_prefix = "grpc-proto-ec886024c2f7b7f597ba89d5b7d60c3f94627b17",
-    urls = ["https://github.com/grpc/grpc-proto/archive/ec886024c2f7b7f597ba89d5b7d60c3f94627b17.tar.gz"],
+    sha256 = "4bc0d84c96dbe910eac5460a3de1ca97fabdec1cc02ceffbbf6c66145c5418fb",
+    strip_prefix = "grpc-proto-a0e6d670f8e6357305698fbfd06b4fbcb3b3d63b",
+    urls = ["https://github.com/grpc/grpc-proto/archive/a0e6d670f8e6357305698fbfd06b4fbcb3b3d63b.tar.gz"],
 )
 
 http_archive(