Update link to renamed sampler.
Update link to renamed sampler.

Closes #461


git-svn-id: https://svn.apache.org/repos/asf/jmeter/trunk@1859864 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: bab1a3fb9f10ffbe1ac2b8d22bf894e51640964b
etnetera/jmeter,apache/jmeter,benbenw/jmeter,apache/jmeter,apache/jmeter,apache/jmeter,etnetera/jmeter,apache/jmeter,ham1/jmeter,ham1/jmeter,ham1/jmeter,ham1/jmeter,ham1/jmeter,benbenw/jmeter,etnetera/jmeter,etnetera/jmeter,benbenw/jmeter,benbenw/jmeter,etnetera/jmeter