Added Fluiditype (gatsbyjs#22686)

* Added Fluiditype 

Adding a site build with Gatsby, which is about fluid typography

* Update sites.yml

* Update docs/sites.yml

Co-authored-by: gatsbybot <mathews.kyle+gatsbybot@gmail.com>
Co-authored-by: Kyle Mathews <mathews.kyle@gmail.com>
Co-authored-by: LB <laurie@gatsbyjs.com>

docs/sites.yml

@@ -10140,6 +10140,17 @@
     - Web Development
   built_by: Jason Zheng
   built_by_url: https://github.com/bilafish
+- title: Fluiditype
+  url: https://www.fluiditype.com/
+  main_url: https://www.fluiditype.com/
+  description: >
+    Fluditype is small CSS library focusing on pure typographic fluidity. Recommend to be used for blogs, portfolios, documentation & and simplistic text websites.
+  categories:
+    - Open Source
+    - Design
+  built_by: Boris Kirov
+  built_by_url: https://www.boriskirov.com
+  featured: false
 - title: Bonsaiilabs
   main_url: https://bonsaiilabs.com/
   url: https://bonsaiilabs.com/