docs: typo in modules.md

[uh-zz]

Description

In the build section, the file name of the last build was spring4shell.wasm, so this has been corrected.
https://aquasecurity.github.io/trivy/dev/docs/advanced/modules/

Checklist

• I've read the guidelines for contributing to this repository.
• I've followed the conventions in the PR title.
• I've added tests that prove my fix is effective or that my feature works.
• I've updated the documentation with the relevant information (if needed).
• I've added usage information (if the PR introduces new options)
• I've included a "before" and "after" example to the description (if the PR is a user interface change).

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