[Upgrade] Correctly archive dirs with pillar data

Related-Prod: PROD-22115 (PROD:22115)
Change-Id: I30913dea2a0b161eff789ba455d2c80d3ce6372d
diff --git a/upgrade-mcp-release.groovy b/upgrade-mcp-release.groovy
index e863b53..08d4783 100644
--- a/upgrade-mcp-release.groovy
+++ b/upgrade-mcp-release.groovy
@@ -88,9 +88,9 @@
             sh "diff -u ${workspace}/${oldSuffix}/${minion} ${workspace}/${newSuffix}/${minion} > ${fileName} || true"
         }
     }
-    archiveArtifacts artifacts: "${workspace}/${oldSuffix}"
-    archiveArtifacts artifacts: "${workspace}/${newSuffix}"
-    archiveArtifacts artifacts: "${workspace}/${diffDir}"
+    archiveArtifacts artifacts: "${oldSuffix}/*"
+    archiveArtifacts artifacts: "${newSuffix}/*"
+    archiveArtifacts artifacts: "${diffDir}/*"
 }
 
 if (common.validInputParam('PIPELINE_TIMEOUT')) {