Merge bitcoindevkit/bdk#1853: wallet: Bump bitcoin dependency to v0.32.4

5553e8d2a9ad066399cdf96c6081638c5724032a wallet: Bump bitcoin dependency to v0.32.4 (Steven Roose)

Pull request description:

  This is required since we are using Network::Testnet4

  ### Changelog notice

  bdk_wallet:

  - deps: Bump `bitcoin` to 0.32.4

  ### 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:
  ValuedMammal:
    ACK 5553e8d2a9ad066399cdf96c6081638c5724032a
  notmandatory:
    ACK 5553e8d2a9ad066399cdf96c6081638c5724032a

Tree-SHA512: e88e7137ecfba89fb89d00ef1109376ec464919df34f5024a5a9f808c0fb4cd2a120d44c7edf0428bab21d264e18db171c6042df3968b078fd758b33e1f15c10