build(deps): restore now-proto-pdu and proxy_cfg to 0.4.2

These crates have no dependency on picky or picky-related crates, so their
downgrade was unnecessary. Restoring them to 0.4.2 as included in the original
dependabot update.

Co-authored-by: CBenoit <3809077+CBenoit@users.noreply.github.com>

Author: Copilot

Cargo.lock

@@ -44,7 +44,7 @@ win-api-wrappers = { path = "../crates/win-api-wrappers", optional = true }
 
 [dependencies.now-proto-pdu]
 optional = true
-version = "0.4.1"
+version = "0.4.2"
 features = ["std"]
 
 [target.'cfg(windows)'.build-dependencies]