add description

packages/components/credentials/UpstashRedisApi.credential.ts

@@ -4,12 +4,15 @@ class UpstashRedisApi implements INodeCredential {
     label: string
     name: string
     version: number
+    description: string
     inputs: INodeParams[]
 
     constructor() {
         this.label = 'Upstash Redis API'
         this.name = 'upstashRedisApi'
         this.version = 1.0
+        this.description =
+            'Refer to <a target="_blank" href="https://upstash.com/docs/redis/overall/getstarted">official guide</a> on how to create redis instance and get redis REST URL and Token'
         this.inputs = [
             {
                 label: 'Upstash Redis REST URL',