There's a merged pull request on the void-packages repository

python3-ldap: update to 3.4.3
https://github.com/void-linux/void-packages/pull/42634

Description:
Build was failing after revbump in #41948 
- remove unnecessary sed expression
- simplify distfile url

#### Testing the changes
- I tested the changes in this PR: test suite passes, I don't use this package directly

#### Local build testing
- I built this PR locally for my native architecture, (x86_64-glibc)
- I built this PR locally for my native architecture, (x86_64-musl)
- I built this PR locally for these architectures:
  - aarch64-musl
  - armv7l
  - armv6l-musl
  - i686