stagehand-server-v3/v3.6.6

What's Changed

• remove experimental requirement on agent variables (#2079) by @miguelg719 in https://github.com/browserbase/stagehand/pull/2080
• remove default temp by @filip-michalsky in https://github.com/browserbase/stagehand/pull/2076
• [STG-1935] fix: strengthen observe element ID prompting by @shrey150 in https://github.com/browserbase/stagehand/pull/2089
• [chore]: commit updated spec by @seanmcguire12 in https://github.com/browserbase/stagehand/pull/2095
• STG-1806 Make model API key optional in OpenAPI by @monadoid in https://github.com/browserbase/stagehand/pull/2094

Full Changelog: https://github.com/browserbase/stagehand/compare/stagehand-server-v3/v3.6.5...stagehand-server-v3/v3.6.6