Merge bitcoindevkit/bdk#1890: ci: automated update to rustc 1.85.0

Merge bitcoindevkit/bdk#1890: ci: automated update to rustc 1.85.0

d23d6be02f10dcc24e19e5d595f40874b3f7667b ci: automated update to rustc 1.85.0 (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 d23d6be02f10dcc24e19e5d595f40874b3f7667b

Tree-SHA512: 572496e4606e05f0cf56ed7f17131170cae739cab9bd7dc163cefd3208ebd569554617db71ed7d0d7f2b74a05374e9480226a67e3a6701052f38795f343c84ba