cmake: quote `COMPONENTS` string in `curl-config.in.cmake`

For consistency and for handling an accidental empty more gracefully.

Follow-up to 7d546e52b21c94e1d4f6669d2d4d64f79bff0d7b #21540

Closes #21699

diff --git a/CMake/curl-config.in.cmake b/CMake/curl-config.in.cmake
index 1c0eec36ed812ce2f18b23a9d8c1c83c0081f6de..b4300ca2108c4441c38269f7c3f78928cfd9d6a7 100644 (file)
--- a/CMake/curl-config.in.cmake
+++ b/CMake/curl-config.in.cmake
@@ -122,7 +122,7 @@ if("@USE_NGHTTP3@")
   list(APPEND _curl_libs CURL::nghttp3)
 endif()
 if("@USE_NGTCP2@")
-  find_dependency(NGTCP2 MODULE COMPONENTS @NGTCP2_CRYPTO_BACKEND@)
+  find_dependency(NGTCP2 MODULE COMPONENTS "@NGTCP2_CRYPTO_BACKEND@")
   list(APPEND _curl_libs CURL::ngtcp2)
 endif()
 if("@USE_GNUTLS@")