Improve nebula-graph topic

Author: yixinglu

topics/nebula-graph/index.md

@@ -0,0 +1,13 @@
+---
+created_by: vesoft, Inc.
+display_name: NebulaGraph
+github_url: https://github.com/vesoft-inc/nebula
+logo: nebula-graph.png
+related: graph, database
+released: '2019'
+short_description: NebulaGraph is an open-source distributed graph database built for super large-scale graphs with milliseconds of latency.
+topic: nebula-graph
+url: https://nebula-graph.io
+wikipedia_url: https://en.wikipedia.org/wiki/NebulaGraph
+---
+NebulaGraph is a popular open source graph database that can handle large volumes of data with milliseconds of latency, scale up quickly, and have the ability to perform fast graph analytics. NebulaGraph has been widely used for social media, recommendation systems, knowledge graphs, security, capital flows, AI, etc.