chore: Use release please to manage datastore snippet version

Author: lqiu96

java-datastore/google-cloud-datastore/src/main/java/com/google/cloud/datastore/telemetry/DatastoreMetricsRecorder.java

@@ -125,7 +125,7 @@ static DatastoreMetricsRecorder getInstance(@Nonnull DatastoreOptions datastoreO
           new OpenTelemetryDatastoreMetricsRecorder(customOtel, TelemetryConstants.METRIC_PREFIX));
     }
 
-    // Default metrics are disabled and user has not custom Otel instance
+    // Default metrics are disabled and user has no custom Otel instance
     if (recorders.isEmpty()) {
       return new NoOpDatastoreMetricsRecorder();
     }

java-datastore/samples/snippets/pom.xml

@@ -41,7 +41,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-datastore</artifactId>
-      <version>2.40.0</version>
+      <version>2.40.0</version><!-- {x-version-update:google-cloud-datastore:current} -->
     </dependency>
     <!-- [END datastore_install_with_bom] -->