Update data-affinity.adoc (#1360)

Fixed doc bug #1277 where description is truncated. Removed the line
break to fix

docs/modules/cluster-performance/pages/data-affinity.adoc

@@ -1,6 +1,5 @@
 = Data Affinity
-:description: Data affinity ensures that related entries exist on the same member. If related data is on the same member, operations can
-be executed without the cost of extra network calls and extra wire data. This feature is provided by using the same partition keys for related data.
+:description: Data affinity ensures that related entries exist on the same member. If related data is on the same member, operations can be executed without the cost of extra network calls and extra wire data. This feature is provided by using the same partition keys for related data.
 
 {description}