### Description When I enable the repo indexer, and search code in Chinese, I got a 500 error ``` ini [indexer] REPO_INDEXER_ENABLED = true ```  ### Gitea Version latest ### Can you reproduce the bug on the Gitea demo site? No ### Log Gist _No response_ ### Screenshots _No response_ ### Git Version _No response_ ### Operating System _No response_ ### How are you running Gitea? build ### Database None