fixed typo

Change-Id: I947ac947b1b3db9d5ddff6d6efd7cfdceda471d8

Author: japod

docs/src/main/docbook/rx-client.xml

@@ -59,7 +59,7 @@
     <title>Reactive Jersey Client API</title>
 
     <para>
-        Reactive Jersey Client API is quite a qeneric API allowing end users to utilize the popular reactive programming model
+        Reactive Jersey Client API is quite a generic API allowing end users to utilize the popular reactive programming model
         when using Jersey Client. Several extensions come out of the box with Jersey that bring support for several existing
         3rd party libraries for reactive programming. Along with describing the API itself, this section also covers
         existing extension modules and provides hints to implement a custom extension if needed.