Bump google-genai from 1.19.0 to 1.20.0 (#592)

Bumps [google-genai](https://github.com/googleapis/python-genai) from 1.19.0 to 1.20.0.
- [Release notes](https://github.com/googleapis/python-genai/releases)
- [Changelog](https://github.com/googleapis/python-genai/blob/main/CHANGELOG.md)
- [Commits](https://github.com/googleapis/python-genai/compare/v1.19.0...v1.20.0)

---
updated-dependencies:
- dependency-name: google-genai
  dependency-version: 1.20.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

poetry.lock

@@ -1025,14 +1025,14 @@ requests = ["requests (>=2.20.0,<3.0.0.dev0)"]
 
 [[package]]
 name = "google-genai"
-version = "1.19.0"
+version = "1.20.0"
 description = "GenAI Python SDK"
 optional = false
 python-versions = ">=3.9"
 groups = ["main", "dev"]
 files = [
-    {file = "google_genai-1.19.0-py3-none-any.whl", hash = "sha256:a2955612e4af8c84f83eb43c1ce4e74e1b714732926d0705e639761938192466"},
-    {file = "google_genai-1.19.0.tar.gz", hash = "sha256:66f5de78075781bfd9e423f1e3592e4240759dfe0ac42ac74a9dcb2c4f662e9d"},
+    {file = "google_genai-1.20.0-py3-none-any.whl", hash = "sha256:ccd61d6ebcb14f5c778b817b8010e3955ae4f6ddfeaabf65f42f6d5e3e5a8125"},
+    {file = "google_genai-1.20.0.tar.gz", hash = "sha256:dccca78f765233844b1bd4f1f7a2237d9a76fe6038cf9aa72c0cd991e3c107b5"},
 ]
 
 [package.dependencies]
@@ -1044,6 +1044,9 @@ requests = ">=2.28.1,<3.0.0"
 typing-extensions = ">=4.11.0,<5.0.0"
 websockets = ">=13.0.0,<15.1.0"
 
+[package.extras]
+aiohttp = ["aiohttp (<4.0.0)"]
+
 [[package]]
 name = "groq"
 version = "0.26.0"