Update dependency markdownlint-cli to ^0.33.0 (#45)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [markdownlint-cli](https://github.com/igorshubovych/markdownlint-cli) | devDependencies | minor | [`^0.32.0` -> `^0.33.0`](https://renovatebot.com/diffs/npm/markdownlint-cli/0.32.2/0.33.0) |

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Reviewed-on: #45
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package.json

@@ -28,7 +28,7 @@
   "devDependencies": {
     "exec-bin": "^1.0.0",
     "hugo-installer": "^4.0.0",
-    "markdownlint-cli": "^0.32.0",
+    "markdownlint-cli": "^0.33.0",
     "rimraf": "^4.0.0"
   },
   "otherDependencies": {