Upgrade opentelemetry-proto to 1.4.0-alpha (micrometer-metrics#5698)

gradle/libs.versions.toml

@@ -188,7 +188,7 @@ nettyBom = { module = "io.netty:netty-bom", version.ref = "netty" }
 newrelicApi = { module = "com.newrelic.agent.java:newrelic-api", version.ref = "newrelic-api" }
 okhttp = { module = "com.squareup.okhttp3:okhttp", version.ref = "okhttp" }
 # some proto are marked alpha, hence the alpha version. metrics proto is what we use and it is marked stable
-openTelemetry-proto = { module = "io.opentelemetry.proto:opentelemetry-proto", version = "1.3.2-alpha" }
+openTelemetry-proto = { module = "io.opentelemetry.proto:opentelemetry-proto", version = "1.4.0-alpha" }
 osgiJunit5 = "org.osgi:org.osgi.test.junit5:1.3.0"
 postgre = { module = "org.postgresql:postgresql", version.ref = "postgre" }
 prometheusMetricsBom = { module = "io.prometheus:prometheus-metrics-bom", version.ref = "prometheus" }