v3.1.1

Changelog

• 5b9b7ef Update CHANGELOG.md file with v3.1.1
• 1a97501 Update GoReleaser config
• 67f703e Merge pull request #22 from instana/update_index.md
• c82ad88 Extend index.md with Infrastructure Alert Config
• 45de6a0 Update Changlog for v3.1.0