Bump submodules/t3rn from c309a3e to 2fbdbb3

Bumps [submodules/t3rn](/~https://github.com/t3rn/t3rn) from `c309a3e` to `2fbdbb3`.
- [Release notes](/~https://github.com/t3rn/t3rn/releases)
- [Commits](t3rn/t3rn@c309a3e...2fbdbb3)

---
updated-dependencies:
- dependency-name: submodules/t3rn
  dependency-type: direct:production
...

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