chore: upgrade crate versions

* mithril-client-cli from `0.12.6` to `0.12.7`

Author: dlachaume

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "mithril-client-cli"
-version = "0.12.6"
+version = "0.12.7"
 description = "A Mithril Client"
 authors = { workspace = true }
 edition = { workspace = true }