appview/pages/markup: use fmt.Sprintf instead of incorrect path.Join

Signed-off-by: Anirudh Oppiliappan <[e-mail]>

appview/pages/markup/markdown.go

···
 	repoName := fmt.Sprintf("%s/%s", rctx.RepoInfo.OwnerDid, rctx.RepoInfo.Name)
 
 	query := fmt.Sprintf("repo=%s&ref=%s&path=%s&raw=true",
-		repoName, url.PathEscape(rctx.RepoInfo.Ref), actualPath)
+		url.PathEscape(repoName), url.PathEscape(rctx.RepoInfo.Ref), actualPath)
 
 	parsedURL := &url.URL{
 		Scheme:   scheme,

appview/repo/repo.go

···
 	"log/slog"
 	"net/http"
 	"net/url"
-	"path"
 	"path/filepath"
 	"slices"
 	"strconv"
···
 		}
 
 		// fetch the raw binary content using sh.tangled.repo.blob xrpc
-		repoName := path.Join("%s/%s", f.OwnerDid(), f.Name)
+		repoName := fmt.Sprintf("%s/%s", f.OwnerDid(), f.Name)
 		blobURL := fmt.Sprintf("%s://%s/xrpc/sh.tangled.repo.blob?repo=%s&ref=%s&path=%s&raw=true",
 			scheme, f.Knot, url.QueryEscape(repoName), url.QueryEscape(ref), url.QueryEscape(filePath))