chore: prepare v0.28.0 (#3615)

- and revert http@1.4.0

Author: omansfeld

Cargo.lock

@@ -20,7 +20,7 @@ description = "Neqo, the Mozilla implementation of QUIC in Rust."
 keywords = ["quic", "http3", "neqo", "mozilla", "ietf", "firefox"]
 categories = ["network-programming", "web-programming"]
 readme = "README.md"
-version = "0.27.0"
+version = "0.28.0"
 # Keep in sync with `.rustfmt.toml` `edition`.
 edition = "2024"
 license = "MIT OR Apache-2.0"
@@ -33,7 +33,7 @@ cfg_aliases = { version = "0.2", default-features = false }
 enum-map = { version = "2.7", default-features = false }
 enumset = { version = "1.1", default-features = false }
 hex = { version = "0.4", default-features = false }
-http = { version = "1", default-features = false, features = ["std"] }
+http = { version = "0.2.9", default-features = false }
 libc = { version = "0.2", default-features = false }
 log = { version = "0.4", default-features = false }
 nss = { rev = "0.9.0", package = "nss-rs", git = "https://github.com/mozilla/nss-rs" }