Update public pool names (#6995)

Author: alexperovich

eng/pipeline.yml

@@ -28,7 +28,7 @@ jobs:
         # Will eventually change this to two BYOC pools.
         # agent pool can't be read from a user-defined variable (Azure DevOps limitation)
         ${{ if eq(variables['System.TeamProject'], 'public') }}:
-          name: NetCore1ESPool-Svc-Public
+          name: NetCore-Svc-Public
           demands: ImageOverride -equals Build.Windows.10.Amd64.VS2019.Open
         ${{ if eq(variables['System.TeamProject'], 'internal') }}:
           name: NetCore1ESPool-Svc-Internal