[infra] Fix code_assets and native_toolchain_c versions (#2474)

* Fix code assets version

* Fix native_toolchain_c

Author: mosuem

pkgs/code_assets/pubspec.yaml

@@ -3,7 +3,7 @@ description: >-
   This library contains the hook protocol specification for bundling native code
   with Dart packages.
 
-version: 0.19.4
+version: 0.19.5
 
 repository: https://github.com/dart-lang/native/tree/main/pkgs/code_assets
 

pkgs/native_toolchain_c/pubspec.yaml

@@ -1,7 +1,7 @@
 name: native_toolchain_c
 description: >-
   A library to invoke the native C compiler installed on the host machine.
-version: 0.18.0
+version: 0.17.1
 repository: https://github.com/dart-lang/native/tree/main/pkgs/native_toolchain_c
 
 topics: