Merge #466: fix(ci): pin idna_adapter to 1.2.1

d3fe261 fix(ci): pin `idna_adapter` to `1.2.1` (Leonardo Lima)

Pull request description:

  ### Description

  It fixes the MSRV CI by pining `idna_adapter`.

  ### Notes to the reviewers

  I noticed it's broken after merging #441, this PR should fix it.

  ### Changelog notice

  ```

  ### Changed
  - fix(ci): pin `idna_adapter` to `1.2.1`

  ```

  ### 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 `just p` before pushing

ACKs for top commit:
  luisschwab:
    ACK d3fe261

Tree-SHA512: 92526486fd4719715e8a63eed007701094d5369afa51b98ebf5d5f98a3c043c9360b9f8ac82c234bbed402e4b89d53a8c49dd523b8663d4033bf6067179f13a5

Author: ValuedMammal

ci/pin-msrv.sh

@@ -10,6 +10,7 @@ set -euo pipefail
 # cargo clean
 # rustup default 1.85.0
 
+cargo update -p idna_adapter --precise "1.2.1"
 cargo update -p icu_normalizer --precise "2.1.1"
 cargo update -p icu_provider --precise "2.1.1"
 cargo update -p icu_locale_core --precise "2.1.1"