Bump github.com/alecthomas/kingpin/v2 from 2.3.2 to 2.4.0 (#556)

Bumps [github.com/alecthomas/kingpin/v2](https://github.com/alecthomas/kingpin) from 2.3.2 to 2.4.0.
- [Release notes](https://github.com/alecthomas/kingpin/releases)
- [Commits](alecthomas/kingpin@v2.3.2...v2.4.0)

---
updated-dependencies:
- dependency-name: github.com/alecthomas/kingpin/v2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.mod

@@ -3,7 +3,7 @@ module github.com/nginxinc/nginx-prometheus-exporter
 go 1.21.3
 
 require (
-	github.com/alecthomas/kingpin/v2 v2.3.2
+	github.com/alecthomas/kingpin/v2 v2.4.0
 	github.com/go-kit/log v0.2.1
 	github.com/nginxinc/nginx-plus-go-client v1.2.0
 	github.com/prometheus/client_golang v1.17.0

go.sum

@@ -1,5 +1,5 @@
-github.com/alecthomas/kingpin/v2 v2.3.2 h1:H0aULhgmSzN8xQ3nX1uxtdlTHYoPLu5AhHxWrKI6ocU=
-github.com/alecthomas/kingpin/v2 v2.3.2/go.mod h1:0gyi0zQnjuFk8xrkNKamJoyUo382HRL7ATRpFZCw6tE=
+github.com/alecthomas/kingpin/v2 v2.4.0 h1:f48lwail6p8zpO1bC4TxtqACaGqHYA22qkHjHpqDjYY=
+github.com/alecthomas/kingpin/v2 v2.4.0/go.mod h1:0gyi0zQnjuFk8xrkNKamJoyUo382HRL7ATRpFZCw6tE=
 github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137 h1:s6gZFSlWYmbqAuRjVTiNNhvNRfY2Wxp9nhfyel4rklc=
 github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137/go.mod h1:OMCwj8VM1Kc9e19TLln2VL61YJF0x1XFtfdL4JdbSyE=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=