test(rustfix): Update for nightly (#15717)

### What does this PR try to resolve?

This unblocks Red CI, see [#t-cargo > Red CI: rustfix @
💬](https://rust-lang.zulipchat.com/#narrow/channel/246057-t-cargo/topic/Red.20CI.3A.20rustfix/near/526449337)

### How to test and review this PR?

Inspired by #15713

Author: epage

Cargo.lock

@@ -84,7 +84,7 @@ regex = "1.11.1"
 rusqlite = { version = "0.34.0", features = ["bundled"] }
 rustc-hash = "2.1.1"
 rustc-stable-hash = "0.1.2"
-rustfix = { version = "0.9.0", path = "crates/rustfix" }
+rustfix = { version = "0.9.2", path = "crates/rustfix" }
 same-file = "1.0.6"
 schemars = "0.9.0"
 security-framework = "3.2.0"

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rustfix"
-version = "0.9.1"
+version = "0.9.2"
 authors = [
     "Pascal Hertleif <killercup@gmail.com>",
     "Oliver Schneider <oli-obk@users.noreply.github.com>",

crates/rustfix/Cargo.toml

@@ -1,7 +1,8 @@
 // See <https://github.com/rust-lang/cargo/issues/13027>
 macro_rules! foo {
     () => {
-        let _ = &1;
+        let x = Box::new(1);
+        let _ = &x;
     };
 }