fix(tools): updated browser use and stagehand to use the latest model… #6830

Job	Run time
Test and Build / Test and Build	3m 48s
Check Docs Changes	-5s
Build AMD64 (./docker/db.Dockerfile, ghcr.io/simstudioai/migrations, ECR_MIGRATIONS)	2m 29s
Build AMD64 (./docker/realtime.Dockerfile, ghcr.io/simstudioai/realtime, ECR_REALTIME)	3m 8s
Build AMD64 (./docker/app.Dockerfile, ghcr.io/simstudioai/simstudio, ECR_APP)	7m 15s
Build ARM64 (GHCR Only)	0s
Create GHCR Manifests	0s
Process Docs	0s
	16m 35s

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