Update com_github_apple_swift_swift_protobuf from 1.18.0 to 1.19.0.

PiperOrigin-RevId: 444708022
diff --git a/tensorflow/workspace2.bzl b/tensorflow/workspace2.bzl
index f02fa4c..be6431f 100644
--- a/tensorflow/workspace2.bzl
+++ b/tensorflow/workspace2.bzl
@@ -813,9 +813,9 @@
     # https://github.com/apple/swift-protobuf/releases
     tf_http_archive(
         name = "com_github_apple_swift_swift_protobuf",
-        strip_prefix = "swift-protobuf-1.18.0/",
-        sha256 = "6b96d07bfbfa1334909eeb1430c69a93af71c961695b0a5f3536d087a58d8e41",
-        urls = tf_mirror_urls("https://github.com/apple/swift-protobuf/archive/1.18.0.zip"),
+        strip_prefix = "swift-protobuf-1.19.0/",
+        sha256 = "f057930b9dbd17abeaaceaa45e9f8b3e87188c05211710563d2311b9edf490aa",
+        urls = tf_mirror_urls("https://github.com/apple/swift-protobuf/archive/1.19.0.tar.gz"),
     )
 
     # https://github.com/google/xctestrunner/releases