Cargo.toml: patch for rust-lang/rust#110475

Newly-released rustc 1.71 no longer compiles our rust-miniscript
dependency. Patch rust-miniscript, then elements-miniscript, then this,
to hack around it.

Cargo.toml

@@ -20,7 +20,7 @@ bitcoin = { version = "0.29.2", optional = true }
 bitcoin_hashes = "0.11"
 byteorder = "1.3"
 elements = { version = "0.21.1", optional = true }
-elements-miniscript = { git = "https://github.com/ElementsProject/elements-miniscript", rev = "955f380" }
+elements-miniscript = { git = "https://github.com/apoelstra/elements-miniscript", tag = "2023-07--rust-simplicity-patch" }
 simplicity-sys = { version = "0.1.0", path = "./simplicity-sys" }
 actual-serde = { package = "serde", version = "1.0.103", features = ["derive"], optional = true }