azure-pipelines.yml: Decreased maximum parallel jobs to 7
azure-pipelines.yml: Decreased maximum parallel jobs to 7

jeme/lucenenet,NightOwl888/lucenenet,NightOwl888/lucenenet,NightOwl888/lucenenet,jeme/lucenenet,apache/lucenenet,sisve/lucenenet,apache/lucenenet,apache/lucenenet,jeme/lucenenet,sisve/lucenenet,NightOwl888/lucenenet,apache/lucenenet,jeme/lucenenet