chore: upgrade @snyk/snyk-hex-plugin to 2.2.1

Updates the Hex (Elixir) dependency plugin from 2.1.0 to 2.2.1 and keeps package-lock.json in sync (minimal lockfile update).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: 2 people

package-lock.json

@@ -72,7 +72,7 @@
     "@snyk/fix": "file:packages/snyk-fix",
     "@snyk/gemfile": "1.2.0",
     "@snyk/snyk-cocoapods-plugin": "3.1.1",
-    "@snyk/snyk-hex-plugin": "2.1.1",
+    "@snyk/snyk-hex-plugin": "2.2.1",
     "@types/marked": "^4.0.0",
     "abbrev": "^1.1.1",
     "adm-zip": "^0.5.9",