chore(deps): update otel/opentelemetry-collector-contrib docker tag to v0.138.0 (#2391)

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

Author: renovate[bot]

aws-xray/src/awsTest/java/io/opentelemetry/contrib/aws/xray/AwsXrayRemoteSamplerIntegrationTest.java

@@ -45,7 +45,7 @@ static boolean hasAwsCredentials() {
   private static final GenericContainer<?> otelCollector =
       new GenericContainer<>(
               DockerImageName.parse(
-                  "otel/opentelemetry-collector-contrib:0.137.0@sha256:886722fe0f37af9d1fe24d29529253ec59fbf263b3b1df4facaf221373e19d23"))
+                  "otel/opentelemetry-collector-contrib:0.138.0@sha256:4a951ff0a9772f4fa8e9c7a326434370301b98b2b813933468dcb54aa6a6b5e5"))
           .withExposedPorts(13133, 2000)
           .waitingFor(Wait.forHttp("/").forPort(13133))
           .withLogConsumer(new Slf4jLogConsumer(LoggerFactory.getLogger("otel-collector")))