docs: update for 1.0.0 (#17)

Author: apricote

README.md

@@ -13,7 +13,7 @@ It works directly with the Hetzner Cloud API, and does not require Prometheus or
 
 ## Requirements
 
-- Grafana 10+
+- Grafana 12+
 
 ## Getting Started
 

src/plugin.json

@@ -2,15 +2,14 @@
   "$schema": "https://raw.githubusercontent.com/grafana/grafana/main/docs/sources/developers/plugins/plugin.schema.json",
   "type": "datasource",
   "name": "Hetzner Cloud",
-  "state": "beta",
   "id": "apricote-hcloud-datasource",
   "metrics": true,
   "backend": true,
   "executable": "gpx_hcloud",
   "includes": [
     {
       "type": "dashboard",
-      "name": "Demo",
+      "name": "demo",
       "path": "dashboards/demo.json"
     }
   ],