Update io_grpc_proto digest to 4489ffe

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 = "d1d8a545088f3a2f22d7753c78646d21c25b47c2dc275c0fc31d8883985ebddf",
+    strip_prefix = "grpc-proto-4489ffe132a2991bd17848c92b05f6502532f4a1",
+    urls = ["https://github.com/grpc/grpc-proto/archive/4489ffe132a2991bd17848c92b05f6502532f4a1.tar.gz"],
 )
 
 http_archive(