bazel: update bazelisk to 1.12.0

[Aghassi]

Small change to update bazel container to use bazelisk 1.12.0 now instead of 1.10.1.

https://github.com/bazelbuild/bazelisk/releases

[ghost]

All CLA requirements met.

[bamurtaugh]

Thanks for opening @Aghassi! I just emailed the maintainer listed for the Bazel definition with links to this PR and #1507, asking for feedback.

[bamurtaugh]

As a heads up @Aghassi, our team has been actively focused on an updated plan for community contributions and this repo moving forward, which we've now outlined in this issue: #1589. This includes moving to a couple new repos for images (https://github.com/devcontainers/images) and Features (https://github.com/devcontainers/features).

We anticipate to have a similar repo and distribution process for templates/definitions. We'll keep everyone updated (likely via another issue in this repo or comment on #1589) when our new templates repo is available and the process is defined.

Please let me know if you have any questions, thank you!

[Aghassi]

Thanks. Any update from the maintainer on getting these changes merged in the meantime?

[bamurtaugh]

I have not yet heard back from the community member who contributed this dev container.

As a general note, like how we have a core set of images and Features we are now maintaining and are excited for the community to self-publish others, we'll ultimately have a core set of templates and will welcome the community to self-publish ones like this.