Fix docs in extended dist generation

Author: Forist2034

src/bootstrap/src/core/build_steps/dist.rs

@@ -1690,7 +1690,11 @@ impl Step for Extended {
 
             let prepare = |name: &str| {
                 builder.create_dir(&exe.join(name));
-                let dir = if name == "rust-std" || name == "rust-analysis" {
+                let dir = if name == "rust-std"
+                    || name == "rust-analysis"
+                    || name == "rust-docs"
+                    || name == "rust-json-docs"
+                {
                     format!("{}-{}", name, target.triple)
                 } else if name == "rust-analyzer" {
                     "rust-analyzer-preview".to_string()