Update milestones for Preview2/3 (#60521)

Author: wtgodbe

.github/policies/resourceManagement.yml

@@ -377,18 +377,18 @@ configuration:
           branch: main
       then:
       - addMilestone:
-          milestone: 10.0-preview2
+          milestone: 10.0-preview3
       description: '[Milestone Assignments] Assign Milestone to PRs merged to the `main` branch'
     - if:
       - payloadType: Pull_Request
       - isAction:
           action: Closed
       - targetsBranch:
-          branch: release/10.0-preview1
+          branch: release/10.0-preview2
       then:
       - removeMilestone
       - addMilestone:
-          milestone: 10.0-preview1
+          milestone: 10.0-preview2
       description: '[Milestone Assignments] Assign Milestone to PRs merged to release/10.0-preview1 branch'
     - if:
       - payloadType: Issues