📝 (blog): add classifications and update metadata for Scrum Master article

Add a comprehensive classification JSON file to the blog post on Scrum Masters, detailing various categories and their relevance to the content. Update the metadata to include additional contributors and tags, enhancing the discoverability and context of the article. These changes aim to improve the article's alignment with relevant topics and increase its visibility in searches related to Agile Project Management and Scrum practices.

Author: MrHinsh