Update redis tags link and default version (#105)

public/v2/apps/redis.json

@@ -24,11 +24,12 @@
         "start": "Redis is an open source key-value store that functions as a data structure server.\n\n After installation on CapRover, it will be available as srv-captain--YOUR_CONTAINER_NAME at port 6379 to other CapRover apps.\n\n Enter your Redis container name and click on next. It will take about a minute for the process to finish.",
         "end": "Redis is deployed and available as srv-captain--$$cap_appname:6379 to other apps. For example with NodeJS: const client = redis.createClient(6379, 'srv-captain--$$cap_appname' , {password: '$$cap_redis_password'})"
     },
-    "variables": [{
+    "variables": [
+        {
             "id": "$$cap_redis_version",
             "label": "Redis Version Tag",
-            "description": "Check out their Docker page for the valid tags https://hub.docker.com/r/_/redis/tags/",
-            "defaultValue": "4",
+            "description": "Check out their Docker page for the valid tags: https://hub.docker.com/_/redis?tab=tags",
+            "defaultValue": "5",
             "validRegex": "/^([^\\s^\\/])+$/"
         },
         {
@@ -37,5 +38,4 @@
             "validRegex": "/^([a-zA-Z0-9-_])+$/"
         }
     ]
-
 }