Fix incorrect path in artifactory docker api

Related-PROD: PROD-33134

Change-Id: I634fedcd5371147e53dd8246f561a344b00fbedb
diff --git a/src/com/mirantis/mcp/MCPArtifactory.groovy b/src/com/mirantis/mcp/MCPArtifactory.groovy
index cc30f8c..34af6d0 100644
--- a/src/com/mirantis/mcp/MCPArtifactory.groovy
+++ b/src/com/mirantis/mcp/MCPArtifactory.groovy
@@ -199,7 +199,7 @@
  * @param artifactoryCreds String, artifactory creds to use. Optional, default is 'artifactory'
  */
 def imageExists(String artifactoryURL, String imageRepo, String tag, String artifactoryCreds = 'artifactory') {
-    def url = artifactoryURL + '/v2/' + imageRepo + '/manifest/' + tag
+    def url = artifactoryURL + '/v2/' + imageRepo + '/manifests/' + tag
     def result
     withCredentials([
             [$class          : 'UsernamePasswordMultiBinding',