Update patch-polkadot-sdk for bug fixes, removal of is-terminal

Adds a deny entry for `is-terminal` to stop it from secretly reappearing.

Restores the `is-terminal` patch for `is_terminal_polyfill` to have one less
external dependency.

patches/is_terminal_polyfill/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "is_terminal_polyfill"
+version = "1.70.1"
+description = "is_terminal_polyfill written around std::io::IsTerminal"
+license = "MIT"
+repository = "https://github.com/serai-dex/serai/tree/develop/patches/is_terminal_polyfill"
+authors = ["Luke Parker <lukeparker5132@gmail.com>"]
+keywords = []
+edition = "2021"
+rust-version = "1.70"
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]

patches/is_terminal_polyfill/src/lib.rs

@@ -0,0 +1 @@
+pub use std::io::IsTerminal;