[Apps] Chore: Add jakub as code owner (#5637)

<!-- start pr-codex -->

## PR-Codex overview
This PR updates the `CODEOWNERS` file to include a new owner, `@jakubkrehel`, for specific apps. This change reflects the addition of `@jakubkrehel` to the ownership of the `apps/dashboard/`, `apps/playground-web/`, and `apps/wallet-ui/` directories.

### Detailed summary
- Added `@jakubkrehel` as an owner for:
  - `apps/dashboard/`
  - `apps/playground-web/`
  - `apps/wallet-ui/`

> ✨ Ask PR-Codex anything about this PR by commenting with `/codex {your question}`

<!-- end pr-codex -->

Author: gregfromstl

.github/CODEOWNERS

@@ -17,9 +17,9 @@ packages/tw-tsconfig/ @jnsdls @joaquim-verges
 
 # apps
 apps/ @jnsdls @joaquim-verges
-apps/dashboard/ @jnsdls @MananTank @joaquim-verges
-apps/playground-web/ @joaquim-verges @gregfromstl @jnsdls @joaquim-verges
-apps/wallet-ui/ @gregfromstl @jnsdls @joaquim-verges @MananTank
+apps/dashboard/ @jnsdls @MananTank @joaquim-verges @jakubkrehel
+apps/playground-web/ @joaquim-verges @gregfromstl @jnsdls @joaquim-verges @jakubkrehel
+apps/wallet-ui/ @gregfromstl @jnsdls @joaquim-verges @MananTank @jakubkrehel
 apps/portal/ @thirdweb-dev/product @thirdweb-dev/platform @thirdweb-dev/infra
 
 # .github folder + .changeset + turbo config is owned by jonas for now