Fix clippy not working because of readon -> reason typo in emilk#7594

Author: MarijnS95

clippy.toml

@@ -39,9 +39,9 @@ disallowed-methods = [
   # but we cannot disable them all here (because of e.g. https://github.com/rust-lang/rust-clippy/issues/10406)
   # so we do that in `clipppy_wasm.toml` instead.
 
-  { path = "std::env::temp_dir", readon = "Use the tempfile crate instead" },
+  { path = "std::env::temp_dir", reason = "Use the tempfile crate instead" },
   { path = "std::panic::catch_unwind", reason = "We compile with `panic = abort" },
-  { path = "std::thread::spawn", readon = "Use `std::thread::Builder` and name the thread" },
+  { path = "std::thread::spawn", reason = "Use `std::thread::Builder` and name the thread" },
 ]
 
 # https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_names