Encourage readers to use a UPS

as suggested by `https://opentezos.com/node-baking/baking/persistent-baker/#running-tezos-binaries-as-services`
trilitech · Jan 20, 2025 · 4279b22 · 4279b22
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diff --git a/docs/tutorials/bake-with-ledger.md b/docs/tutorials/bake-with-ledger.md
@@ -31,3 +31,9 @@ In this tutorial, we'll look at:
  - A Ledger device: Nano S, Nano S+, Nano X, Stax or Flex
  - A computer or cloud VM that can run without interruptions, because the baker program must run persistently
  - The latest version of the Octez suite, including the `octez-signer` program
+
+:::note
+
+Note that a PIN input will be required after a power failure. To ensure a truly persistent system, please use a [UPS](https://wikipedia.org/wiki/Uninterruptible_power_supply).
+
+:::