Fix l10n copy: only copy locales into existing coreutils utilities

The l10n repo contains utilities (e.g. hashsum) that don't exist in
the coreutils workspace. Copying entire directories created phantom
workspace members that broke Cargo.

.github/workflows/website.yml

@@ -57,7 +57,13 @@ jobs:
 
     - name: Copy l10n locales into coreutils
       run: |
-        cp -r coreutils-l10n/src/uu/* coreutils/src/uu/ 2>/dev/null || true
+        # Only copy locales into utilities that already exist in coreutils
+        for util_dir in coreutils-l10n/src/uu/*/; do
+          util=$(basename "$util_dir")
+          if [ -d "coreutils/src/uu/$util" ]; then
+            cp -r "$util_dir/locales" "coreutils/src/uu/$util/" 2>/dev/null || true
+          fi
+        done
         cp -r coreutils-l10n/src/uucore/* coreutils/src/uucore/ 2>/dev/null || true
 
     - name: Build Coreutils Docs