Relocate markdownlint configuration file and update workflow to use it

Author: rohan-pandeyy

.markdownlint-cli2.jsonc .github/.markdownlint-cli2.jsonc.markdownlint-cli2.jsonc renamed to .github/.markdownlint-cli2.jsonc

@@ -15,6 +15,8 @@ jobs:
 
       - name: Markdown lint
         uses: DavidAnson/markdownlint-cli2-action@v23
+        with:
+          config: .github/.markdownlint-cli2.jsonc
 
       - name: Set up Node.js
         uses: actions/setup-node@v3