Hotfix/v0.1.3

[0ngk]

This pull request updates the workflow for publishing and releases, as well as bumping several dependency versions and the project version. The main changes are improvements to the publishing process and dependency updates.

Workflow improvements:

• Updated the publish job in .github/workflows/gleam-bootstrap.yml to use ubuntu-latest instead of ubuntu-24.04 and set the deployment environment to release.
• Enhanced the publishing step to check for the presence of the HEXPM_API_KEY secret before attempting to publish, providing a clear error message if it is missing, and added a shell preamble for safer script execution. Also, the publish command now pipes a message into gleam publish.

Dependency and version updates:

• Updated gleam_stdlib to version 0.71.0 and gleam_time to version 1.8.0 in examples/kitazith_example/manifest.toml. Also updated the local kitazith package version to 0.1.3.
• Bumped the project version in gleam.toml from 0.1.0 to 0.1.3.