Merge bitcoindevkit/bdk#1529: fix: typos

a8efeaa0fb83848a04e7324311ccaca4e2c4ab71 fix: typos (Jose Storopoli)

Pull request description:

  ### Description

  Needed for the typos nix check in #1320.

  ### Notes to the reviewers

  More typos that the Nix CI caught.

  ### Changelog notice

  - fix: typos

  ### 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

  #### New Features:

  * [ ] I've added tests for the new feature
  * [ ] I've added docs for the new feature

  #### Bugfixes:

  * [ ] This pull request breaks the existing API
  * [ ] I've added tests to reproduce the issue which are now passing
  * [ ] I'm linking the issue being fixed by this PR

ACKs for top commit:
  notmandatory:
    ACK a8efeaa0fb83848a04e7324311ccaca4e2c4ab71

Tree-SHA512: 44a625bcf538acb7a766316f1d512ef3fd7cc14aae03f09b129229946ef156be35dff73dab3dc24fbc21137764b5707a2bd632bfb84b38dc9fe4d061659ac766