Nope it's actually considered good practice to resubmit a sitemap to Google
when you have some new content.
If you publish like one or two articles per day then I would simply use:
Submit URL - Google
https://www.google.com/webmasters/tools/submit-url
To just request indexing of new content and not crawl again and again already indexed pages.
Depending on the frequency you publish content Google will automatically adjust crawl rate most of the site it downloads website sitemap every 2 days.