Update dependency markdownlint-cli2 to v0.5.1

| datasource | package           | from  | to    |
| ---------- | ----------------- | ----- | ----- |
| npm        | markdownlint-cli2 | 0.3.2 | 0.5.1 |


Signed-off-by: Renovate Bot <[email protected]>

Author: renovate[bot]

setup/markdownlint/package-lock.json

@@ -2,6 +2,6 @@
   "name": "laminas-continuous-integration-action-markdownlint",
   "description": "Frozen dependencies required for installing a stable \\`markdownlint\\` binary",
   "dependencies": {
-    "markdownlint-cli2": "0.3.2"
+    "markdownlint-cli2": "0.5.1"
   }
 }