Update Docker workflow and fix RUBY_DEBUG reference

- Trigger Docker workflow on docker branches
- Fix RUBY_DEBUG path in debug_ruby_assert_type macro

Author: ianks

.github/workflows/docker.yml

@@ -6,6 +6,7 @@ on:
   push:
     branches:
       - main
+      - *docker*
     tags:
       - v*
 

crates/rb-sys/src/utils.rs

@@ -43,7 +43,7 @@ pub(crate) unsafe fn is_ruby_vm_started() -> bool {
 #[macro_export]
 macro_rules! debug_ruby_assert_type {
     ($obj:expr, $type:expr, $message:expr) => {
-        if $crate::RUBY_DEBUG != 0 {
+        if $crate::uncategorized::RUBY_DEBUG != 0 {
             #[allow(clippy::macro_metavars_in_unsafe)]
             unsafe {
                 assert!(