fix: upgrade snyk-docker-plugin from 4.21.0 to 4.21.1

Snyk has created this PR to upgrade snyk-docker-plugin from 4.21.0 to 4.21.1.

See this package in npm:
https://www.npmjs.com/package/snyk-docker-plugin

See this project in Snyk:
https://app.dev.snyk.io/org/mosheshemoon/project/2a66b37b-6226-4d06-95b7-d4121098482b?utm_source=github&utm_medium=upgrade-pr

Author: snyk-bot

package-lock.json

@@ -47,7 +47,7 @@
     "needle": "^2.6.0",
     "sleep-promise": "^9.1.0",
     "snyk-config": "5.0.0",
-    "snyk-docker-plugin": "^4.21.0",
+    "snyk-docker-plugin": "^4.21.1",
     "source-map-support": "^0.5.16",
     "tunnel": "0.0.6",
     "typescript": "^4.3.2",