Change MCP_VERSION => TARGET_MCP_VERSION for upgrade

Change-Id: I28514f48efeb745c0f9e8d408edf1d9a4735fec1
Bug-relateted: PROD-24789 (PROD:24789)
diff --git a/jenkins/client/job/deploy/update/upgrade_mcp_release.yml b/jenkins/client/job/deploy/update/upgrade_mcp_release.yml
index 18f5646..e1e04e7 100644
--- a/jenkins/client/job/deploy/update/upgrade_mcp_release.yml
+++ b/jenkins/client/job/deploy/update/upgrade_mcp_release.yml
@@ -29,13 +29,13 @@
             SALT_MASTER_CREDENTIALS:
               type: string
               default: "salt"
-            MCP_VERSION:
+            TARGET_MCP_VERSION:
               type: string
               default: ""
             UPDATE_CLUSTER_MODEL:
               type: boolean
               default: 'true'
-              description: "Replace `apt_mk_version` parameter in cluster level Reclass model."
+              description: "Replace `mcp_version` parameter in cluster level Reclass model."
             UPGRADE_SALTSTACK:
               type: boolean
               default: 'true'
@@ -51,4 +51,4 @@
             PIPELINE_TIMEOUT:
               type: string
               default: '12'
-              description: "Sets pipeline timeout in hours. Defaults to '12' if left empty."
\ No newline at end of file
+              description: "Sets pipeline timeout in hours. Defaults to '12' if left empty."