Update issues URL

Author: stevehenty

composer.json

@@ -4,7 +4,7 @@
   "type": "wp-cli-package",
   "homepage": "https://github.com/gravityforms/gravityformscli",
   "support": {
-    "issues": "https://gravityhelp.com"
+    "issues": "https://gravityforms.com"
   },
   "license": "GPLv3",
   "authors": [