Fix missing argument for wizer build assets workflow

[jeffcharles]

Description of the change

Instructs Wizer to use initialize_runtime as the initialization function in the build assets GitHub workflow.

Why am I making this change?

I should have updated this in #780 but we only run this on commits to main and when releasing.

Checklist

• I've updated the relevant CHANGELOG files if necessary. Changes to javy-cli and javy-core do not require updating CHANGELOG files.
• I've updated the relevant crate versions if necessary. Versioning policy for library crates
• I've updated documentation including crate documentation if necessary.