fix: --path flag in update

Recent changes have resulted in the `wolfictl update --path` flag
breaking.

This flag allows for working with a repo where the melange yaml's are in
a subdir such as `./packages` of the repo.

> ℹ️            | 2024/01/31 00:40:50 wolfictl update: attempt 1: failed to update packages in git repository: failed to parse open docker-compose.yaml: no such file or directory

Author: joemiller

pkg/update/update.go

@@ -369,7 +369,7 @@ func (o *Options) updateGitPackage(ctx context.Context, repo *git.Repository, pa
 	root := worktree.Filesystem.Root()
 	log.Printf("working directory: %s", root)
 
-	configFile := filepath.Join(root, pc.Filename)
+	configFile := filepath.Join(pc.Dir, pc.Filename)
 	if configFile == "" {
 		return "", fmt.Errorf("no config filename found for package %s", packageName)
 	}
@@ -416,7 +416,7 @@ func (o *Options) updateGitPackage(ctx context.Context, repo *git.Repository, pa
 	}
 
 	// now make sure update config is configured
-	updated, err := config.ParseConfiguration(ctx, filepath.Join(root, pc.Filename))
+	updated, err := config.ParseConfiguration(ctx, filepath.Join(pc.Dir, pc.Filename))
 	if err != nil {
 		return "", fmt.Errorf("failed to parse %v", err)
 	}
@@ -435,7 +435,7 @@ func (o *Options) updateGitPackage(ctx context.Context, repo *git.Repository, pa
 
 	// Skip any processing for definitions with a single pipeline
 	if len(updated.Pipeline) > 1 {
-		if err := o.updateGoBumpDeps(updated, root, pc.Filename, mutations); err != nil {
+		if err := o.updateGoBumpDeps(updated, pc.Dir, pc.Filename, mutations); err != nil {
 			return fmt.Sprintf("error cleaning up go/bump deps: %v", err), nil
 		}
 	}