ci: Replace markdown-lint action

Use the GitHub Action maintained by the author of markdownlint-cli.

Author: antoineco

.github/workflows/docs.yml

@@ -25,7 +25,9 @@ jobs:
           filter_mode: nofilter
 
       - name: Lint
-        uses: avto-dev/markdown-lint@v1
+        uses: DavidAnson/markdownlint-cli2-action@v17
         with:
-          args: '**/*.md'
-          config: .github/workflows/lint/markdown.yml
+          config: .github/workflows/lint/rules.markdownlint.yml
+          globs: |
+            **/*.md
+            !.github/ISSUE_TEMPLATE/*.md

.github/workflows/lint/markdown.yml renamed to .github/workflows/lint/rules.markdownlint.yml

@@ -144,9 +144,3 @@ MD047: true
 # Code fence style <https://github.com/DavidAnson/markdownlint/blob/master/doc/Rules.md#md048>
 MD048:
   style: 'backtick'
-
-# Custom rules:
-CHANGELOG-RULE-001: true
-CHANGELOG-RULE-002: true
-CHANGELOG-RULE-003: true
-CHANGELOG-RULE-004: true