chore: upgrade crate versions

* mithril-aggregator from `0.7.47` to `0.7.48`

Author: Alenar

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "mithril-aggregator"
-version = "0.7.47"
+version = "0.7.48"
 description = "A Mithril Aggregator server"
 authors = { workspace = true }
 edition = { workspace = true }