fix(release): replace deprecated 'folder' field with 'directory' in GoReleaser config

[platinummonkey]

Summary

Fixes the GoReleaser release workflow failure by replacing the deprecated folder field with directory in the Homebrew brew configuration.

Problem

The release workflow was failing with error:

yaml: unmarshal errors:
  line 169: field folder not found in type config.Homebrew

The folder field was deprecated in GoReleaser v2.x and replaced with directory.

Changes

• Updated .goreleaser.yml:169 to use directory instead of folder

Testing

• Configuration change validated against GoReleaser v2.13.3 documentation
• Will be tested when release workflow runs on this PR merge

Related Issues

Fixes release workflow run #21913974032

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🤖 Generated with Claude Code

[github-actions]

📊 Test Coverage Report

Overall Coverage: 81.7%

Threshold: 80% ✅

Coverage by Package

## Coverage by Package

- github.com/DataDog/pup/pkg/auth/callback/server.go:40: 81.2%
- github.com/DataDog/pup/pkg/auth/dcr/client.go:28: 100.0%
- github.com/DataDog/pup/pkg/auth/dcr/types.go:24: 100.0%
- github.com/DataDog/pup/pkg/auth/oauth/client.go:22: 100.0%
- github.com/DataDog/pup/pkg/auth/oauth/pkce.go:24: 85.7%
- github.com/DataDog/pup/pkg/auth/storage/factory.go:53: 94.7%
- github.com/DataDog/pup/pkg/auth/storage/keychain.go:44: 42.9%
- github.com/DataDog/pup/pkg/auth/storage/storage.go:58: 71.4%
- github.com/DataDog/pup/pkg/auth/types/types.go:23: 100.0%
- github.com/DataDog/pup/pkg/client/client.go:32: 94.4%
- github.com/DataDog/pup/pkg/config/alias.go:26: 100.0%
- github.com/DataDog/pup/pkg/config/config.go:22: 100.0%
- github.com/DataDog/pup/pkg/formatter/formatter.go:31: 100.0%
- github.com/DataDog/pup/pkg/useragent/useragent.go:32: 100.0%
- github.com/DataDog/pup/pkg/util/time.go:20: 95.8%

## Summary

total:								(statements)		81.7%

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📈 Coverage Status: ✅ PASSED - Coverage meets minimum threshold

_{Updated for commit cc34f32}