Update Bazel example to point to 1.4.0

Signed-off-by: Steffen Smolka <smolkaj@google.com>

bazel/example/WORKSPACE.bazel

@@ -11,8 +11,8 @@ local_repository(
 
 # http_archive(
 #     name = "com_github_p4lang_p4runtime",
-#     urls = ["https://github.com/p4lang/p4runtime/archive/v1.3.0.tar.gz"],
-#     strip_prefix = "p4runtime-1.3.0/proto",
+#     urls = ["https://github.com/p4lang/p4runtime/archive/v1.4.0.tar.gz"],
+#     strip_prefix = "p4runtime-1.4.0/proto",
 #     # sha256 = "<insert hash value here>",
 # )
 
@@ -21,7 +21,7 @@ local_repository(
 #   remote = "https://github.com/p4lang/p4runtime.git",
 #   # strip_prefix = "proto",  # https://github.com/bazelbuild/bazel/issues/10062
 #   patch_cmds = ["mv proto/* ."],  # Workaround since strip_prefix is broken.
-#   tag = "v1.3.0",
+#   tag = "v1.4.0",
 # )
 
 load("@com_github_p4lang_p4runtime//:p4runtime_deps.bzl", "p4runtime_deps")