Update ensure_pure_cbor2.sh

Author: nielstron

ensure_pure_cbor2.sh

@@ -27,7 +27,7 @@ sys.exit(1 if using_c_ext else 0)
 
 if [ $? -ne 0 ]; then
     echo "Reinstalling cbor2 with pure Python implementation..."
-    $PYTHON -m pip uninstall -y cbor2 || uv pip uninstall -y cbor2
+    $PYTHON -m pip uninstall -y cbor2 || uv pip uninstall cbor2
     CBOR2_BUILD_C_EXTENSION=0 $PYTHON -m pip install --no-binary cbor2 "cbor2==$CBOR2_VERSION" --force-reinstall || CBOR2_BUILD_C_EXTENSION=0 uv pip install --no-binary cbor2 "cbor2==$CBOR2_VERSION" --force-reinstall
     echo "Successfully reinstalled cbor2 with pure Python implementation"
 else