Fix a typo in server.memory.pagecache.size doc string (neo4j#1359)

modules/ROOT/pages/configuration/configuration-settings.adoc

@@ -2568,7 +2568,7 @@ m|+++4+++
 [frame="topbot", stripes=odd, grid="cols", cols="<1s,<4"]
 |===
 |Description
-a|The amount of memory to use for mapping the store files. If Neo4j is running on a dedicated server, then it is generally recommended to leave about 2-4 gigabytes for the operating system, give the JVM enough heap to hold all your transaction state and query context, and then leave the rest for the page cache. If no page cache memory is configured, then a heuristic setting is computed based on available system resources. By default the size of page cache will be 50% och available RAM minus the max heap size.The size of the page cache will also not be larger than 70x the max heap size (due to some overhead of the page cache in the heap.
+a|The amount of memory to use for mapping the store files. If Neo4j is running on a dedicated server, then it is generally recommended to leave about 2-4 gigabytes for the operating system, give the JVM enough heap to hold all your transaction state and query context, and then leave the rest for the page cache. If no page cache memory is configured, then a heuristic setting is computed based on available system resources. By default the size of page cache will be 50% of available RAM minus the max heap size. The size of the page cache will also not be larger than 70x the max heap size (due to some overhead of the page cache in the heap.
 |Valid values
 a|A byte size (valid multipliers are `B`, `KiB`, `KB`, `K`, `kB`, `kb`, `k`, `MiB`, `MB`, `M`, `mB`, `mb`, `m`, `GiB`, `GB`, `G`, `gB`, `gb`, `g`, `TiB`, `TB`, `PiB`, `PB`, `EiB`, `EB`).
 |Default value