Bump up the AzDO default job timeout to 3 hours

- aspnet/AspNetCore-Internal#1909

Author: dougbu

.azure/pipelines/jobs/default-build.yml

@@ -64,7 +64,7 @@ parameters:
   buildScript: ''
   installNodeJs: true
   installJdk: true
-  timeoutInMinutes: 120
+  timeoutInMinutes: 180
 
 jobs:
 - job: ${{ coalesce(parameters.jobName, parameters.agentOs) }}