Fix examples/general.c compilation

git_reference_listall() -> git reference_list()

examples/general.c

@@ -392,7 +392,7 @@ int main (int argc, char** argv)
   // Here we will implement something like `git for-each-ref` simply listing out all available
   // references and the object SHA they resolve to.
   git_strarray ref_list;
-  git_reference_listall(&ref_list, repo, GIT_REF_LISTALL);
+  git_reference_list(&ref_list, repo, GIT_REF_LISTALL);
 
   const char *refname;
   git_reference *ref;