Update routers/api/v1/repo/file.go

Co-authored-by: wxiaoguang <[email protected]>

Author: Mic92

routers/api/v1/repo/file.go

@@ -321,7 +321,7 @@ func download(ctx *context.APIContext, archiveName string, archiver *repo_model.
 
 	// Add nix format link header so tarballs lock correctly:
 	// https://github.com/nixos/nix/blob/56763ff918eb308db23080e560ed2ea3e00c80a7/doc/manual/src/protocols/tarball-fetcher.md
-	ctx.Resp.Header().Add("Link", fmt.Sprintf("<%s/archive/%s.tar.gz?rev=%s>; rel=\"immutable\"",
+	ctx.Resp.Header().Add("Link", fmt.Sprintf(`<%s/archive/%s.tar.gz?rev=%s>; rel="immutable"`,
 		ctx.Repo.Repository.APIURL(),
 		archiver.CommitID, archiver.CommitID))