docs(custom): updated FAQ to determine if I support older versions

Author: BottlecapDave

_docs/faq.md

@@ -176,6 +176,10 @@ The first thing to do is make sure the correct tariff has been picked up. This c
 
 If the correct tariff is present, it might be that you're on a tariff that has different rates depending on if you pay by direct debit or not. This can be configured via your [account configuration](./setup/account.md#favour-direct-debit-rates).
 
+## Do you support older versions of the integration?
+
+Due to time constraints, I will only ever support the latest version of the integration. If you have an issue with an older version of the integration, my initial answer will always be to update to the latest version. This might be different to what HACS is reporting if you are not on the minimum supported Home Assistant version (which is highlighted in each release's changelog). 
+
 ## How do I know when there's an update available?
 
 If you've installed via HACS, and you are on version 2 or above, then updates will be surfaced in the normal update location within Home Assistant. If you are on a version below 2, then you can keep an eye on `sensor.hacs` to see the number of pending updates. This could be used with an automation or highlighted on your dashboard. This will include any HACS integration update, not just this one.