Fix Jenkins job parameters for obs-installability check

Signed-off-by: Luis Araujo <luis.araujo@collabora.co.uk>

obs-installability/Jenkinsfile

@@ -12,9 +12,9 @@ pipeline {
       steps {
         sh """#!/bin/bash
           set -uex
-          # assume a job name such as `apertis-v2020dev0/health/obs-installability-target` and try to
+          # assume a job name such as `apertis-v2020dev0/health/obs-installability` and try to
           # derive default parameters from that
-          IFS='-/' read _ RELEASE _ _ _ _ <<< "${env.JOB_NAME}"
+          IFS='-/' read _ RELEASE _ _ _ <<< "${env.JOB_NAME}"
           test -n "${params.RELEASE}" && RELEASE=${params.RELEASE}
 
           export HOME=/tmp