Update prometheus binding failure logging format (#6979)

Using `{:#?}` for the error details is a bit annoying, this change makes
a more consistent formatting style for error messages.

---------

Co-authored-by: Bastian Köcher <[email protected]>
Co-authored-by: command-bot <>
Co-authored-by: Sebastian Kunert <[email protected]>

Author: 3 people

prdoc/pr_6979.prdoc

@@ -0,0 +1,8 @@
+title: Update prometheus binding failure logging format
+doc:
+- audience: Node Dev
+  description: |-
+    Using `{:#?}` for the error details is a bit annoying, this change makes a more consistent formatting style for error messages.
+crates:
+- name: substrate-prometheus-endpoint
+  bump: patch

substrate/utils/prometheus/src/lib.rs

@@ -87,7 +87,7 @@ async fn request_metrics(
 /// to serve metrics.
 pub async fn init_prometheus(prometheus_addr: SocketAddr, registry: Registry) -> Result<(), Error> {
 	let listener = tokio::net::TcpListener::bind(&prometheus_addr).await.map_err(|e| {
-		log::error!(target: "prometheus", "Error binding to '{:#?}': {:#?}", prometheus_addr, e);
+		log::error!(target: "prometheus", "Error binding to '{prometheus_addr:?}': {e:?}");
 		Error::PortInUse(prometheus_addr)
 	})?;