chore: add Square Starter to the starters list (#21586)

* chore add starter info

* moped up tags and features to possibly prevent ci failures

* chore: format

Co-authored-by: GatsbyJS Bot <mathews.kyle+gatsbybot@gmail.com>

docs/starters.yml

@@ -5301,3 +5301,27 @@
     - Responsive webpage
     - Portfolio
     - Blog
+- url: https://gatsby-contentful-portfolio-blog.netlify.com/
+  repo: https://github.com/escapemanuele/gatsby-contentful-blog-portfolio
+  description: Simple gatsby starter for integration with Contentful. The result is a clean and nice website for businesses or freelancers with a blog and a portfolio.
+  tags:
+    - Blog
+    - CMS:Headless
+    - CMS:Contentful
+    - Portfolio
+  features:
+    - Styled components
+    - Responsive webpage
+    - Portfolio
+    - Blog
+- url: https://example-site-for-square-starter.netlify.com/
+  repo: https://github.com/jonniebigodes/example-site-for-square-starter
+  description: A barebones starter to help you kickstart your next Gatsby project with Square payments
+  tags:
+    - Square
+    - Netlify
+    - SEO
+  features:
+    - Serverless
+    - Gatsby
+    - Square payments