Update mdcng/mdc Docker tag to v1.20.11 (#3078)

* Update mdcng/mdc Docker tag to v1.20.11

* Update app version [skip ci]

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Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: github-action update-app-version <githubaction@githubaction.com>

apps/mdc-ng/1.20.11/docker-compose.yml

@@ -4,7 +4,7 @@ networks:
 
 services:
   mdc-ng:
-    image: mdcng/mdc:1.20.10
+    image: mdcng/mdc:1.20.11
     container_name: ${CONTAINER_NAME}
     labels:
       createdBy: "Apps"