build(deps): bump github.com/btcsuite/btcd from 0.20.1-beta to 0.23.2

Bumps [github.com/btcsuite/btcd](https://github.com/btcsuite/btcd) from 0.20.1-beta to 0.23.2.
- [Release notes](https://github.com/btcsuite/btcd/releases)
- [Changelog](https://github.com/btcsuite/btcd/blob/master/CHANGES)
- [Commits](btcsuite/btcd@v0.20.1-beta...v0.23.2)

---
updated-dependencies:
- dependency-name: github.com/btcsuite/btcd
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -26,7 +26,6 @@ require (
 	github.com/Masterminds/sprig/v3 v3.2.3 // indirect
 	github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6 // indirect
 	github.com/VictoriaMetrics/fastcache v1.6.0 // indirect
-	github.com/btcsuite/btcd v0.20.1-beta // indirect
 	github.com/celo-org/celo-bls-go v0.3.3 // indirect
 	github.com/celo-org/celo-bls-go-android v0.3.2 // indirect
 	github.com/celo-org/celo-bls-go-ios v0.3.2 // indirect