Update README.md (#8880)

iree/samples/static_library/README.md

diff --git a/iree/samples/static_library/README.md b/iree/samples/static_library/README.md
index 3451e00..b22a3f3 100644
--- a/iree/samples/static_library/README.md
+++ b/iree/samples/static_library/README.md
@@ -39,7 +39,7 @@
 for general instructions on building using CMake):
 
   ```shell
-  cmake -B ../iree-build/
+  cmake -B ../iree-build/ \
     -DIREE_BUILD_SAMPLES=ON \
     -DIREE_TARGET_BACKEND_DEFAULTS=OFF \
     -DIREE_TARGET_BACKEND_DYLIB_LLVM_AOT=ON \