Rollup merge of rust-lang#120225 - micolous:patch-1, r=michaelwoerister

Fix -Zremap-path-scope typo

This fixes a documentation typo from rust-lang#115214 where `-Zremap-path-prefix=object` should be `-Zremap-path-scope=object`.

```@rustbot``` label: +F-trim-paths

Author: matthiaskrgr

src/doc/unstable-book/src/compiler-flags/remap-path-scope.md

@@ -20,5 +20,5 @@ This flag accepts a comma-separated list of values and may be specified multiple
 ```sh
 # This would produce an absolute path to main.rs in build outputs of
 # "./main.rs".
-rustc --remap-path-prefix=$(PWD)=/remapped -Zremap-path-prefix=object main.rs
+rustc --remap-path-prefix=$(PWD)=/remapped -Zremap-path-scope=object main.rs
 ```