Merge bitcoindevkit/bdk#1859: ci: pin idna_adapter dep to fix reqest with MSRV 1.75

d4670b377e03bca24a9d0ed0ed6a59221dfe8506 ci: pin idna_adapter dep to fix reqwest with MSRV 1.75 (Steve Myers)

Pull request description:

  ### Description

  The `bdk_esplora` crate depends on `reqwest` which now pins it's `idna_adapter` version to  support newer versions of the `url` crate when testing with it's MSRV. I fixed our CI 1.75 MSRV build by also pinning the `idna_adapter`.

  ### Notes to the reviewers

  The MSRV break was fixed by the `reqwest` team with seanmonstar/reqwest#2470.

  This change was made 2 mo ago, I'm not sure why our CI only broke now.

  ### Changelog notice

  - Pin idna_adapter dep to fix reqwest with MSRV 1.75.

  ### Checklists

  #### All Submissions:

  * [x] I've signed all my commits
  * [x] I followed the [contribution guidelines](https://github.com/bitcoindevkit/bdk/blob/master/CONTRIBUTING.md)
  * [x] I ran `cargo fmt` and `cargo clippy` before committing

ACKs for top commit:
  evanlinjin:
    ACK d4670b377e03bca24a9d0ed0ed6a59221dfe8506

Tree-SHA512: a9eeccf682400272c14ced1141ccbe18a45d614d3ff7f71409c5958c24e1f7d18c96464f2b784d6f2fb5df70e99d8b8410166ff43d15e67a4df0e0a164577e0f