chore(bazel): update protobuf to v3.21.7

PiperOrigin-RevId: 477955264

Author: Google APIs

WORKSPACE

@@ -60,9 +60,9 @@ rules_pkg_dependencies()
 
 http_archive(
     name = "com_google_protobuf",
-    sha256 = "c29d8b4b79389463c546f98b15aa4391d4ed7ec459340c47bffe15db63eb9126",
-    strip_prefix = "protobuf-3.21.3",
-    urls = ["https://github.com/protocolbuffers/protobuf/archive/v3.21.3.tar.gz"],
+    sha256 = "ce2fbea3c78147a41b2a922485d283137845303e5e1b6cbd7ece94b96ade7031",
+    strip_prefix = "protobuf-3.21.7",
+    urls = ["https://github.com/protocolbuffers/protobuf/archive/v3.21.7.tar.gz"],
 )
 
 load("@com_google_protobuf//:protobuf_deps.bzl", "protobuf_deps")