CI: Improve trigger files on Markdown action (#14941)

This will trigger the action when the markdownlint-cli2 config or
the action yaml file are modified.

Author: eksperimental

.github/workflows/ci-markdown.yml

@@ -7,11 +7,18 @@ on:
   push:
     branches:
       - "main"
+
     paths:
       - "**/*.md"
+      - ".github/workflows/ci-markdown.yml"
+      - ".markdownlint-cli2.jsonc"
+
   pull_request:
     paths:
       - "**/*.md"
+      - ".github/workflows/ci-markdown.yml"
+      - ".markdownlint-cli2.jsonc"
+
   workflow_dispatch:
 
 permissions:
@@ -27,10 +34,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Check out the repository
-        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
-        with:
-          fetch-depth: 10
+      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
 
-      - name: Run markdownlint
+      - name: Run markdownlint-cli2
         uses: DavidAnson/markdownlint-cli2-action@30a0e04f1870d58f8d717450cc6134995f993c63 # v21.0.0