Switch condition in OneBranch to just manual builds (#240)

Otherwise it starts an attempt on completed merges.

Author: andyleejordan

.pipelines/SecretManagement-Official.yml

@@ -192,7 +192,7 @@ extends:
             nuGetFeedType: external
             publishFeedCredentials: PowerShellNuGetOrgPush
     - stage: PrepForEv2
-      condition: ne(variables['Build.Reason'], 'Schedule')
+      condition: eq(variables['Build.Reason'], 'Manual')
       dependsOn: build
       variables:
         drop: $(Pipeline.Workspace)/drop_build_main