fix url path for documentation

Author: fhassak

driver-core/src/main/com/mongodb/client/model/Accumulators.java

@@ -20,7 +20,7 @@
  * Builders for accumulators used in the group pipeline stage of an aggregation pipeline.
  *
  * @mongodb.driver.manual core/aggregation-pipeline/ Aggregation pipeline
- * @mongodb.driver.manual operator/aggregation/group/#accumulator-operator Accumulators
+ * @mongodb.driver.manual reference/operator/aggregation/group/#accumulator-operator Accumulators
  * @mongodb.driver.manual meta/aggregation-quick-reference/#aggregation-expressions Expressions
  * @mongodb.server.release 2.2
  * @since 3.1

driver-legacy/src/main/com/mongodb/BulkWriteRequestBuilder.java

@@ -26,9 +26,9 @@
  * A builder for a single write request.
  *
  * @mongodb.server.release 2.6
- * @mongodb.driver.manual /reference/command/delete/ Delete
- * @mongodb.driver.manual /reference/command/update/ Update
- * @mongodb.driver.manual /reference/command/insert/ Insert
+ * @mongodb.driver.manual reference/command/delete/ Delete
+ * @mongodb.driver.manual reference/command/update/ Update
+ * @mongodb.driver.manual reference/command/insert/ Insert
  * @since 2.12
  */
 public class BulkWriteRequestBuilder {