rust: 1.45.0 -> 1.45.2

pkgs/development/compilers/rust/1_45.nix

···
 } @ args:
 
 import ./default.nix {
-  rustcVersion = "1.45.0";
-  rustcSha256 = "0z6dh0yd3fcm3qh960wi4s6fa6pxz9mh77psycsqfkkx5kqra15s";
+  rustcVersion = "1.45.2";
+  rustcSha256 = "0273a1g3f59plyi1n0azf21qjzwml1yqdnj5z472crz37qggr8xp";
 
   # Note: the version MUST be one version prior to the version we're
   # building