submodules: bump external/adrs from d76aa7a to 5acd39c

Bumps [external/adrs](https://github.com/oasisprotocol/adrs) from `d76aa7a` to `5acd39c`.
- [Commits](oasisprotocol/adrs@d76aa7a...5acd39c)

---
updated-dependencies:
- dependency-name: external/adrs
  dependency-type: direct:production
...

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