dep: Use upstream smoltcp

Branch was merged through smoltcp-rs/smoltcp#903

Author: chrysn

Cargo.toml

@@ -91,7 +91,7 @@ embassy-nrf = { git = "https://github.com/chrysn-pull-requests/embassy", branch
 
 usbd-hid-macros = { git = "https://github.com/kaspar030/usbd-hid", branch = "for-riot-rs" }
 
-smoltcp = { git = "https://github.com/chrysn-pull-requests/smoltcp.git", branch = "pktinfo" }
+smoltcp.git = "https://github.com/smoltcp-rs/smoltcp.git" # version 0.12-to-be
 embassy-net = { git = "https://github.com/chrysn-pull-requests/embassy", branch = "for-riot-rs-100424-plus-embeddednal" }
 embassy-sync = { git = "https://github.com/chrysn-pull-requests/embassy", branch = "for-riot-rs-100424-plus-embeddednal" }
 embassy-time = { git = "https://github.com/chrysn-pull-requests/embassy", branch = "for-riot-rs-100424-plus-embeddednal" }