Bump @sap/ux-specification from 1.108.12 to 1.108.13 (#722)

Bumps @sap/ux-specification from 1.108.12 to 1.108.13.

---
updated-dependencies:
- dependency-name: "@sap/ux-specification"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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