Merge bitcoindevkit/bdk#2123: ci: automated update to rustc 1.93.1

b8642d477a583aee08207bb5e24641400c2d94a2 ci: automated update to rustc 1.93.1 (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:
  notmandatory:
    ACK b8642d477a583aee08207bb5e24641400c2d94a2

Tree-SHA512: 35a10e9f751f00093344e65bfdf9869c6373c878ad556927c8856605f08f01362d9615e9e26f386c94e69f62285e28edd411f7c3460827415489846c535fd35f