Update YJIT code owners. Revert accidental commit.

.github/CODEOWNERS

@@ -2,6 +2,8 @@
 # Each line is a file pattern followed by one or more owners.
 # Code owners will be automatically tagged as reviewers when a pull request is opened
 
+# YJIT sources and tests
 yjit* @maximecb @xrxr
 doc/yjit/* @maximecb @xrxr
 bootstraptest/test_yjit* @maximecb @xrxr
+test/ruby/test_yjit* @maximecb @xrxr

yjit.h

@@ -40,7 +40,7 @@ struct rb_yjit_options {
     bool test_backend;
 };
 
-bool rb_yjit_enabled_p(void) ;
+bool rb_yjit_enabled_p(void);
 unsigned rb_yjit_call_threshold(void);
 
 void rb_yjit_invalidate_all_method_lookup_assumptions(void);