HBASE-22898 [DOC] HBaseContext doesn't have hBaseRDD method

Signed-off-by: Jan Hentschel <jan.hentschel@ultratendency.com>

Author: titsuki

src/main/asciidoc/_chapters/spark.adoc

@@ -145,7 +145,7 @@ number of other Spark base functions  are supported out of the box:
 `bulkGet`:: For massively parallel sending of gets to HBase to create a new RDD
 `mapPartition`:: To do a Spark Map function with a Connection object to allow full
 access to HBase
-`hBaseRDD`:: To simplify a distributed scan to create a RDD
+`hbaseRDD`:: To simplify a distributed scan to create a RDD
 // end::spark_base_functions[]
 
 For examples of all these functionalities, see the