[Minor] Eh, one more fix for the format string

Noticed by: @citrin

src/hs_helper.c

@@ -154,8 +154,8 @@ rspamd_hs_helper_cleanup_dir (struct hs_helper_ctx *ctx, gboolean forced)
 					!rspamd_re_cache_is_valid_hyperscan_file (ctx->cfg->re_cache,
 						globbuf.gl_pathv[i], TRUE, TRUE, &err)) {
 				if (unlink (globbuf.gl_pathv[i]) == -1) {
-					msg_err ("cannot unlink %s: %s (reason for expiration: %e)", globbuf.gl_pathv[i],
-							strerror(errno));
+					msg_err ("cannot unlink %s: %s; reason for expiration: %e", globbuf.gl_pathv[i],
+							strerror(errno), err);
 					ret = FALSE;
 				}
 				else {