GHA: minor tweak to step name (NFC)

Author: compnerd

.github/workflows/swift-toolchain.yml

@@ -3113,7 +3113,7 @@ jobs:
           name: compilers-${{ matrix.arch }}
           path: ${{ github.workspace }}/BuildRoot/Library
 
-      - name: Download DevTools
+      - name: Download Developer Tools
         uses: actions/download-artifact@v4
         with:
           name: devtools-${{ matrix.arch }}