Bump setasign/fpdi from 2.6.6 to 2.6.7

Bumps [setasign/fpdi](https://github.com/Setasign/FPDI) from 2.6.6 to 2.6.7.
- [Release notes](https://github.com/Setasign/FPDI/releases)
- [Commits](Setasign/FPDI@v2.6.6...v2.6.7)

---
updated-dependencies:
- dependency-name: setasign/fpdi
  dependency-version: 2.6.7
  dependency-type: indirect
...

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Author: dependabot[bot]