add autoware_internal_msgs to build_depends.repos

Signed-off-by: M. Fatih Cırıt <mfc@leodrive.ai>

Author: M. Fatih Cırıt

build_depends.repos

@@ -16,6 +16,10 @@ repositories:
     type: git
     url: https://github.com/autowarefoundation/autoware_adapi_msgs.git
     version: main
+  core/autoware_internal_msgs:
+    type: git
+    url: https://github.com/autowarefoundation/autoware_internal_msgs.git
+    version: main
   core/external/autoware_auto_msgs:
     type: git
     url: https://github.com/tier4/autoware_auto_msgs.git