chore: update price-feeder example config (#1393)

## Description

Set gas_adjustment to 1 in order to avoid fees errors when trying to submit votes with multiple assets

---

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price-feeder/price-feeder.example.toml

@@ -1,4 +1,4 @@
-gas_adjustment = 1.5
+gas_adjustment = 1
 
 [server]
 listen_addr = "0.0.0.0:7171"