Use subjunctive mood

It's more correct to say "were" rather than "was" here, and it sounds
better to my ear.

Author: traviscross

posts/2024-10-17-Rust-1.82.0.md

@@ -192,7 +192,7 @@ For further details, see [RFC 3484](https://github.com/rust-lang/rfcs/blob/maste
 
 ### Unsafe attributes
 
-Some Rust attributes, such as [`no_mangle`](https://doc.rust-lang.org/reference/abi.html#the-no_mangle-attribute), can be used to [cause undefined behavior without any `unsafe` block](https://github.com/rust-lang/rust/issues/28179). If this was regular code we would require them to be placed in an `unsafe {}` block, but so far attributes have not had comparable syntax. To reflect the fact that these attributes can undermine Rust's safety guarantees, they are now considered "unsafe" and should be written as follows:
+Some Rust attributes, such as [`no_mangle`](https://doc.rust-lang.org/reference/abi.html#the-no_mangle-attribute), can be used to [cause undefined behavior without any `unsafe` block](https://github.com/rust-lang/rust/issues/28179). If this were regular code we would require them to be placed in an `unsafe {}` block, but so far attributes have not had comparable syntax. To reflect the fact that these attributes can undermine Rust's safety guarantees, they are now considered "unsafe" and should be written as follows:
 
 ```rust
 #[unsafe(no_mangle)]