docs: add trailing newline to attestation-verifier-contract.md

editorconfig-checker requires a final newline (insert_final_newline);
the doc rewrite left the file without one, failing Fast CI checks.

Author: pbeza

docs/design/attestation-verifier-contract.md

@@ -574,4 +574,4 @@ E2E tests in `crates/e2e-tests` deploy either the real `tee-verifier` (when the
 [monitor-attestation-removal]: https://github.com/near/mpc/blob/5e47bfe93b398cb2343681fa2c0f2691d02c7285/crates/node/src/tee/remote_attestation.rs#L209
 [submit-participant-info]: https://github.com/near/mpc/blob/efe49230bb66854c55bba080e7610e42f9221506/crates/contract/src/lib.rs#L754-L782
 [launcher-pattern]: https://github.com/near/mpc/blob/efe49230bb66854c55bba080e7610e42f9221506/docs/tee-lifecycle.md#upgrade
-[slack-launcher-discussion]: https://nearone.slack.com/archives/C0B12RKBSAV/p1777897902903889
+[slack-launcher-discussion]: https://nearone.slack.com/archives/C0B12RKBSAV/p1777897902903889