fix(subscription): Make status lower case

The status field was camel case in earlier versions of the API, but was
somehow changed to lower case. To make it compatible with both versions,
make the return value from the API lower case before comparison.

Signed-off-by: Nicolai Buchwitz <nb+github@tipi-net.de>

check_pve.py

@@ -428,13 +428,13 @@ def check_subscription(self) -> None:
         url = self.get_url(f"nodes/{self.options.node}/subscription")
         data = self.request(url)
 
-        if data["status"] == "NotFound":
+        if data["status"].lower() == "notfound":
             self.check_result = CheckState.WARNING
             self.check_message = "No valid subscription found"
-        if data["status"] == "Inactive":
+        if data["status"].lower() == "inactive":
             self.check_result = CheckState.CRITICAL
             self.check_message = "Subscription expired"
-        elif data["status"] == "Active":
+        elif data["status"].lower() == "active":
             subscription_due_date = data["nextduedate"]
             subscription_product_name = data["productname"]