[CI] address cmakelint warnings about whitespace (#9674)

cmake/modules/FindNVML.cmake

@@ -1,4 +1,4 @@
-if (NVML_LIBRARY)
+if(NVML_LIBRARY)
   unset(NVML_LIBRARY CACHE)
 endif()
 

cmake/modules/FindNccl.cmake

@@ -35,17 +35,17 @@
 #
 # This module assumes that the user has already called find_package(CUDA)
 
-if (NCCL_LIBRARY)
+if(NCCL_LIBRARY)
   if(NOT USE_NCCL_LIB_PATH)
     # Don't cache NCCL_LIBRARY to enable switching between static and shared.
     unset(NCCL_LIBRARY CACHE)
   endif()
 endif()
 
-if (BUILD_WITH_SHARED_NCCL)
+if(BUILD_WITH_SHARED_NCCL)
   # libnccl.so
   set(NCCL_LIB_NAME nccl)
-else ()
+else()
   # libnccl_static.a
   set(NCCL_LIB_NAME nccl_static)
 endif()