[DOCS] Update ES glossary reference

Author: jrodewig

docs/src/reference/asciidoc/core/arch.adoc

@@ -31,7 +31,7 @@ NOTE: Due to the similarity in concepts, through-out the docs one can think inte
 
 Shards play a critical role when reading information from {es}. Since it acts as a source, {eh} will create one Hadoop `InputSplit` per {es} shard, or in case of {sp} one `Partition`, that is given a query that works against index `I`. {eh} will dynamically discover the number of shards backing `I` and then for each shard will create, in case of Hadoop an input split (which will determine the maximum number of Hadoop tasks to be executed) or in case of Spark a partition which will determine the `RDD` maximum parallelism.
 
-With the default settings, {es} uses *5* {ref}/glossary.html#glossary-primary-shard[`primary`] shards per index which will result in the same number of tasks on the Hadoop side for each query.
+With the default settings, {es} uses *5* {glossary}/terms.html#glossary-primary-shard[`primary`] shards per index which will result in the same number of tasks on the Hadoop side for each query.
 
 NOTE: {eh} does not query the same shards - it iterates through all of them (primaries and replicas) using a round-robin approach. To avoid data duplication, only one shard is used from each shard group (primary and replicas).