Bump coqprime from d5935ca to 6c225a2 (#1917)

Bumps [coqprime](https://github.com/thery/coqprime) from `d5935ca` to `6c225a2`.
- [Release notes](https://github.com/thery/coqprime/releases)
- [Commits](thery/coqprime@d5935ca...6c225a2)

---
updated-dependencies:
- dependency-name: coqprime
  dependency-type: direct:production
...

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