Update Rust crate tempfile to 3.12.0

Author: renovate[bot]

Cargo.toml

@@ -28,7 +28,7 @@ parse_duration = "2.1.1"
 patchset = { path = "patchset" }
 rcs-ed = { path = "rcs-ed" }
 structopt = "0.3.26"
-tempfile = "3.3.0"
+tempfile = "3.12.0"
 thiserror = "1.0.30"
 tokio = { version = "1.16.1", features = ["fs", "io-util", "macros", "process", "rt-multi-thread", "signal", "sync", "time", "tracing"] }
 walkdir = "2.3.2"