⬆️ Bump google.golang.org/genai from 1.59.0 to 1.60.0

Bumps [google.golang.org/genai](https://github.com/googleapis/go-genai) from 1.59.0 to 1.60.0.
- [Release notes](https://github.com/googleapis/go-genai/releases)
- [Changelog](https://github.com/googleapis/go-genai/blob/main/CHANGELOG.md)
- [Commits](googleapis/go-genai@v1.59.0...v1.60.0)

---
updated-dependencies:
- dependency-name: google.golang.org/genai
  dependency-version: 1.60.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

go.mod

@@ -74,7 +74,7 @@ require (
 	golang.org/x/text v0.37.0 // indirect
 	google.golang.org/adk v1.4.0
 	google.golang.org/api v0.283.0
-	google.golang.org/genai v1.59.0
+	google.golang.org/genai v1.60.0
 	google.golang.org/protobuf v1.36.11 // indirect
 	gopkg.in/yaml.v3 v3.0.1
 )

go.sum

@@ -151,8 +151,8 @@ google.golang.org/adk v1.4.0 h1:Qi4KB9YKD00/I5K9v3QsZ9ng5YiZQ7MfMgM8BZjNcsM=
 google.golang.org/adk v1.4.0/go.mod h1:R8tNFnI/eiBXHn7zJPJtqdiK/WXC+tVkyuZsXyNZXN4=
 google.golang.org/api v0.283.0 h1:0lkp8u0MPwJVHqRL+nJlMAoZVVzbmiXmFHXMOTmSPik=
 google.golang.org/api v0.283.0/go.mod h1:6Wssta4c5n9qHq5CBhmlai5h/PUa1djdDAIhYEHyvcM=
-google.golang.org/genai v1.59.0 h1:xp+ydkJFW8hO0hTUaAkr8TrLM9HFP3NYAwFhPd0nDqA=
-google.golang.org/genai v1.59.0/go.mod h1:mDdPDFXo1Ats7f1WXVyZgWb/CkMzFWTWJruIMy7hGIU=
+google.golang.org/genai v1.60.0 h1:uAkea4tYhCz1LlUmxdiOFAmlrLFaLs8PbXucgZHqHVo=
+google.golang.org/genai v1.60.0/go.mod h1:mDdPDFXo1Ats7f1WXVyZgWb/CkMzFWTWJruIMy7hGIU=
 google.golang.org/genproto v0.0.0-20260319201613-d00831a3d3e7 h1:XzmzkmB14QhVhgnawEVsOn6OFsnpyxNPRY9QV01dNB0=
 google.golang.org/genproto v0.0.0-20260319201613-d00831a3d3e7/go.mod h1:L43LFes82YgSonw6iTXTxXUX1OlULt4AQtkik4ULL/I=
 google.golang.org/genproto/googleapis/api v0.0.0-20260427160629-7cedc36a6bc4 h1:yOzSCGPx+cp5VO7IxvZ9SBFF7j1tZVcNtlHR2iYKtVo=