Merge bitcoindevkit/bdk#1835: ci: automated update to rustc 1.84.1

Merge bitcoindevkit/bdk#1835: ci: automated update to rustc 1.84.1

0e6b249466dc60093c0ac6bad91e271424c67c5f ci: automated update to rustc 1.84.1 (Github Action)

Pull request description:

  Automated update to Github CI workflow `cont_integration.yml` by [create-pull-request](https://github.com/peter-evans/create-pull-request) GitHub action

ACKs for top commit:
  ValuedMammal:
    ACK 0e6b249466dc60093c0ac6bad91e271424c67c5f

Tree-SHA512: a48d4d7fe8e360bbb9555a293749b3c4f14e297968a48d35e9869f7229555b24a2390167c8d041d6fc30b80789b0eef71834ae0c4ca00aa7534c6d4eb5861950