Fix ambiguous id when fetch Actions tasks (#30382)

Fix regression of #30331.

```txt
time="2024-04-10T02:23:49Z" level=error msg="failed to fetch task" func="[fetchTask]" file="[poller.go:91]" error="unknown: rpc error: code = Internal desc = pick task: CreateTaskForRunner: Error 1052 (23000): Column 'id' in field list is ambiguous"
```

Author: wolfogre

models/actions/task.go

@@ -228,7 +228,7 @@ func CreateTaskForRunner(ctx context.Context, runner *ActionRunner) (*ActionTask
 	if runner.RepoID != 0 {
 		jobCond = builder.Eq{"repo_id": runner.RepoID}
 	} else if runner.OwnerID != 0 {
-		jobCond = builder.In("repo_id", builder.Select("id").From("repository").
+		jobCond = builder.In("repo_id", builder.Select("`repository`.id").From("repository").
 			Join("INNER", "repo_unit", "`repository`.id = `repo_unit`.repo_id").
 			Where(builder.Eq{"`repository`.owner_id": runner.OwnerID, "`repo_unit`.type": unit.TypeActions}))
 	}