Update dependency com.google.protobuf:protobuf-java to v4.33.0 (open-telemetry#139)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

build.gradle.kts

@@ -30,7 +30,7 @@ version = ver
 description = "Java Bindings for the OpenTelemetry Protocol (OTLP)"
 
 val grpcVersion = "1.76.0"
-val protobufVersion = "4.32.1"
+val protobufVersion = "4.33.0"
 
 repositories {
   mavenCentral()