Bump protobuf-java-util from 3.21.11 to 3.21.12 in /examples/distro (#7425)

Bumps protobuf-java-util from 3.21.11 to 3.21.12.


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examples/distro/smoke-tests/build.gradle

@@ -5,7 +5,7 @@ plugins {
 dependencies {
   testImplementation("org.testcontainers:testcontainers:1.17.6")
   testImplementation("com.fasterxml.jackson.core:jackson-databind:2.14.1")
-  testImplementation("com.google.protobuf:protobuf-java-util:3.21.11")
+  testImplementation("com.google.protobuf:protobuf-java-util:3.21.12")
   testImplementation("com.squareup.okhttp3:okhttp:4.10.0")
   testImplementation("io.opentelemetry.proto:opentelemetry-proto:0.19.0-alpha")
   testImplementation("io.opentelemetry:opentelemetry-api:${versions.opentelemetry}")