deps: update dependency com.google.cloud.opentelemetry:exporter-trace to v0.31.0

Author: renovate-bot

google-cloud-datastore/pom.xml

@@ -230,7 +230,7 @@
     <dependency>
       <groupId>com.google.cloud.opentelemetry</groupId>
       <artifactId>exporter-trace</artifactId>
-      <version>0.15.0</version>
+      <version>0.31.0</version>
       <scope>test</scope>
     </dependency>
     <dependency>