fix: better message for failed software update check (#4100)

Description
---
Changed the previous failure message for software updates to a warning and made the message clearer.

Motivation and Context
---
The current error message had a typo and looks like a more serious failure, however this happens currently because the
DNS has not been set up for dibbler.

This PR makes it clear that this is just a failure to check for software updates.

How Has This Been Tested?
---
Simple message change

base_layer/p2p/src/auto_update/service.rs

@@ -160,7 +160,7 @@ impl SoftwareUpdaterService {
                 None
             },
             Err(err) => {
-                log::error!(target: LOG_TARGET, "Failed up fetch updates: {}", err);
+                log::warn!(target: LOG_TARGET, "Unable to check for software updates: {}", err);
                 None
             },
         }