Update RedisGraph README.md (#2239)

* Update README.md

Simple example using Cypher to CREATE a graph with relationships and then MATCH on that graph

* Update README.md

Co-authored-by: Leibale Eidelman <[email protected]>

Author: jkoontz2010

packages/graph/README.md

@@ -1 +1,35 @@
 # @redis/graph
+
+Example usage:
+```javascript
+import { createClient } from 'redis';
+
+const client = createClient();
+client.on('error', (err) => console.log('Redis Client Error', err));
+
+await client.connect();
+
+await client.graph.query(
+  'graph',
+  "CREATE (:Rider { name: 'Buzz Aldrin' })-[:rides]->(:Team { name: 'Apollo' })"
+);
+
+const result = await client.graph.query(
+  'graph',
+  `MATCH (r:Rider)-[:rides]->(t:Team) WHERE t.name = 'Apollo' RETURN r.name, t.name`
+);
+
+console.log(result);
+```
+
+Output from console log:
+```json
+{
+  headers: [ 'r.name', 't.name' ],
+  data: [ [ 'Buzz Aldrin', 'Apollo' ] ],
+  metadata: [
+    'Cached execution: 0',
+    'Query internal execution time: 0.431700 milliseconds'
+  ]
+}
+```