racket{,-minimal}: add cacert to nativeBuildInputs, silence warnings

We don't actually perform any network access, but since Racket 7.0,
when certain modules are loaded, they emit an annoying warning.
While compiling the bundled packages, this happens over and over and
pollutes the logs.

Having a correct SSL configuration prevents the warnings.

pkgs/development/interpreters/racket/default.nix

@@ -1,4 +1,5 @@
 { stdenv, fetchurl, makeFontsConf, makeWrapper
+, cacert
 , cairo, coreutils, fontconfig, freefont_ttf
 , glib, gmp
 , gtk3
@@ -60,7 +61,7 @@ stdenv.mkDerivation rec {
     (stdenv.lib.optionalString stdenv.isDarwin "-framework CoreFoundation")
   ];
 
-  nativeBuildInputs = [ wrapGAppsHook ];
+  nativeBuildInputs = [ cacert wrapGAppsHook ];
 
   buildInputs = [ fontconfig libffi libtool sqlite gsettings-desktop-schemas gtk3 ]
     ++ stdenv.lib.optionals stdenv.isDarwin [ libiconv CoreFoundation ];