docs(go): add stdlib

[knqyf263]

Description

Mention the stdlib support in Go binaries

Related issues

• Close Golang stdlib vulnerabilities #4133

Related PRs

• feat(go): add vulndb trivy-db#398
• feat(image): goversion as stdlib #6277

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).

[DmitriyLewen]

@knqyf263 Can you add info about govuln-db in data sources?

[knqyf263]

Nice catch. Added 78104ae

[DmitriyLewen]

I one more idea - what if we will add note that ghsa - for dependency vulns, govuln-db for runtime?

[knqyf263]

Since it's a detail, I added it to the golang page.
ebf85ee