Add missing parameter for error in log message (#20144)

- Adds a `%v` for the last parameter, `err`.

Co-authored-by: John Olheiser <john.olheiser@gmail.com>

routers/private/hook_pre_receive.go

@@ -477,7 +477,7 @@ func (ctx *preReceiveContext) loadPusherAndPermission() bool {
 
 	userPerm, err := access_model.GetUserRepoPermission(ctx, ctx.Repo.Repository, user)
 	if err != nil {
-		log.Error("Unable to get Repo permission of repo %s/%s of User %s", ctx.Repo.Repository.OwnerName, ctx.Repo.Repository.Name, user.Name, err)
+		log.Error("Unable to get Repo permission of repo %s/%s of User %s: %v", ctx.Repo.Repository.OwnerName, ctx.Repo.Repository.Name, user.Name, err)
 		ctx.JSON(http.StatusInternalServerError, private.Response{
 			Err: fmt.Sprintf("Unable to get Repo permission of repo %s/%s of User %s: %v", ctx.Repo.Repository.OwnerName, ctx.Repo.Repository.Name, user.Name, err),
 		})