Upgrade to java-diff-utils 4.12

PiperOrigin-RevId: 567374760

Author: brad4d

WORKSPACE.bazel

@@ -96,7 +96,7 @@ maven_install(
         "com.google.re2j:re2j:1.3",
         "com.google.truth.extensions:truth-liteproto-extension:1.1",
         "com.google.truth.extensions:truth-proto-extension:1.1",
-        "io.github.java-diff-utils:java-diff-utils:4.0",
+        "io.github.java-diff-utils:java-diff-utils:4.12",
         "org.apache.ant:ant:1.10.11",
         "org.jspecify:jspecify:0.2.0",
     ],