docs(spec): clarify that leading-slash paths are relative to bundle r…

[Saviour5538]

Fixes #344

Summary of Changes

• Clarified in SPEC.md §6.2 that path-valued fields starting with a leading slash (/) resolve relative to the root directory of the knowledge bundle, matching the convention defined in §6.1.
• Removes ambiguity regarding POSIX filesystem root vs. bundle root for consumers and parsers.

Validation

• Validated markdown formatting and cross-references against the OKF v0.2 specification.

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

[Saviour5538]

Fixes #344

Summary of Changes

• Clarified in SPEC.md §6.2 that path-valued fields starting with a leading slash (/) resolve relative to the root directory of the knowledge bundle, matching the convention defined in §6.1.
• Removes ambiguity regarding POSIX filesystem root vs. bundle root for consumers and parsers.

Validation

• Validated markdown formatting and cross-references against the OKF v0.2 specification.