Update markdown-link-check version in "Check Markdown" template installation docs

markdown-link-check@3.10.3 is now the version used as standard in all Arduino Tooling projects.

Author: per1234

workflow-templates/check-markdown-task.md

@@ -37,7 +37,7 @@ The tool dependencies of this workflow are managed by [npm](https://www.npmjs.co
 Add the dependencies by running this command:
 
 ```text
-npm install --save-dev markdown-link-check@^3.10.2 markdownlint-cli@^0.32.2
+npm install --save-dev markdown-link-check@^3.10.3 markdownlint-cli@^0.32.2
 ```
 
 Commit the resulting changes to the `package.json` and `package-lock.json` files.