chore(deps): update davidanson/markdownlint-cli2-action action to v15 (hestiacp#4278)

Author: hestiacp-bot

.github/workflows/lint.yml

@@ -15,7 +15,7 @@ jobs:
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
 
       - name: Run markdownlint
-        uses: DavidAnson/markdownlint-cli2-action@455b6612a7b7a80f28be9e019b70abdd11696e4e # v14
+        uses: DavidAnson/markdownlint-cli2-action@510b996878fc0d1a46c8a04ec86b06dbfba09de7 # v15
         with:
           globs: |
             *.md