chore: remove Git-dependency on smoltcp (#7721)

rust/Cargo.lock

@@ -3485,7 +3485,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4979f22fdb869068da03c9f7528f8297c6fd2606bc3a4affe42e6a823fdb8da4"
 dependencies = [
  "cfg-if",
- "windows-targets 0.48.5",
+ "windows-targets 0.52.6",
 ]
 
 [[package]]
@@ -5884,8 +5884,9 @@ dependencies = [
 
 [[package]]
 name = "smoltcp"
-version = "0.11.0"
-source = "git+https://github.com/smoltcp-rs/smoltcp?branch=main#45fa98422b581128591cf18fee659a3db47e8d4f"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dad095989c1533c1c266d9b1e8d70a1329dd3723c3edac6d03bbd67e7bf6f4bb"
 dependencies = [
  "bitflags 1.3.2",
  "byteorder",

rust/Cargo.toml

@@ -102,7 +102,7 @@ serde_variant = "0.1.3"
 sha2 = "0.10.8"
 smallvec = "1.13.2"
 smbios-lib = "0.9.2"
-smoltcp = { version = "0.11", default-features = false }
+smoltcp = { version = "0.12", default-features = false }
 static_assertions = "1.1.0"
 str0m = { version = "0.6.3", default-features = false, features = ["sha1"] }
 stun_codec = "0.3.4"
@@ -179,7 +179,6 @@ unwrap_used = "warn"
 private-intra-doc-links = "allow" # We don't publish any of our docs but want to catch dead links.
 
 [patch.crates-io]
-smoltcp = { git = "https://github.com/smoltcp-rs/smoltcp", branch = "main" }
 boringtun = { git = "https://github.com/firezone/boringtun", branch = "master" }
 str0m = { git = "https://github.com/algesten/str0m", branch = "main" }
 ip_network = { git = "https://github.com/JakubOnderka/ip_network", branch = "master" } # Waiting for release.