feat(deps): update dependency googleapis/genai-toolbox to v0.20.0

[renovate-bot]

This PR contains the following updates:

Package	Update	Change
googleapis/genai-toolbox	minor	0.19.1 -> 0.20.0

---

Release Notes

googleapis/genai-toolbox (googleapis/genai-toolbox)

v0.20.0

Compare Source

Features

• Added prompt support for toolbox (#​1798) (cd56ea4)
• source/alloydb, source/cloud-sql-postgres,source/cloud-sql-mysql,source/cloud-sql-mssql: Use project from env for alloydb and cloud sql control plane tools (#​1588) (12bdd95)
• source/mysql: Set default host and port for MySQL source (#​1922) (2c228ef)
• source/Postgresql: Set default host and port for Postgresql source (#​1927) (7e6e88a)
• tool/looker-generate-embed-url: Adding generate embed url tool (#​1877) (ef63860)
• tools/postgres: Add list_triggers, database_overview tools for postgres (#​1912) (a4c9287)
• tools/postgres: Add list_indexes, list_sequences tools for postgres (#​1765) (897c63d)

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

BEGIN_COMMIT_OVERRIDE
feat: Added prompt support for toolbox (genai-toolbox#​1798) (cd56ea4)
feat: source/alloydb, source/cloud-sql-postgres,source/cloud-sql-mysql,source/cloud-sql-mssql: Use project from env for alloydb and cloud sql control plane tools (genai-toolbox#​1588) (12bdd95)
feat: source/mysql: Set default host and port for MySQL source (genai-toolbox#​1922) (2c228ef)
feat: source/Postgresql: Set default host and port for Postgresql source (genai-toolbox#​1927) (7e6e88a)
feat: tool/looker-generate-embed-url: Adding generate embed url tool (genai-toolbox#​1877) (ef63860)
feat: tools/postgres: Add list_triggers, database_overview tools for postgres (genai-toolbox#​1912) (a4c9287)
feat: tools/postgres: Add list_indexes, list_sequences tools for postgres (genai-toolbox#​1765) (897c63d)
END_COMMIT_OVERRIDE