chore(main): release 1.8.0

[release-please[bot]]

:robot: I have created a release beep boop

1.8.0 (2024-09-18)

Features

• Add CachedContent resource to Vertex AI client library. (8c8963e)
• Implement cached_content with generateContent methods (c604b8c)

---

This PR was generated with Release Please. See documentation.

[release-please[bot]]

:robot: Created releases:

• v1.8.0 :sunflower:

[release-trigger[bot]]

Triggered job: cloud-devrel/client-libraries/nodejs/release/googleapis/nodejs-vertexai/publish (2024-09-25T15:57:49.292Z)

To trigger again, remove the autorelease: triggered label (in a few minutes).

[release-tool-publish-reporter[bot]]

The release build has started, the log can be viewed here. :sunflower:

[release-tool-publish-reporter[bot]]

:egg: You hatched a release! The release build finished successfully! :purple_heart: