Update and rename graphcms.md to hygraph.md (graphql#1271)

Author: jpedroschmitz

src/content/code/services/graphcms.md

@@ -0,0 +1,7 @@
+---
+name: Hygraph
+description: Hygraph is the federated content platform that allows true composability of your stack. Integrate all your services with a unique content federation approach and distribute content from anywhere - to anywhere using a single, powerful GraphQL API.
+url: https://hygraph.com/
+---
+
+