chore(deps): bump github.com/alecthomas/kong from 1.2.1 to 1.4.0 (#705)

Bumps [github.com/alecthomas/kong](https://github.com/alecthomas/kong) from 1.2.1 to 1.4.0.
- [Commits](alecthomas/kong@v1.2.1...v1.4.0)

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

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

Author: dependabot[bot]

go.mod

@@ -3,7 +3,7 @@ module github.com/charmbracelet/gum
 go 1.21
 
 require (
-	github.com/alecthomas/kong v1.2.1
+	github.com/alecthomas/kong v1.4.0
 	github.com/alecthomas/mango-kong v0.1.0
 	github.com/charmbracelet/bubbles v0.20.0
 	github.com/charmbracelet/bubbletea v1.2.1

go.sum

@@ -1,11 +1,11 @@
 github.com/MakeNowJust/heredoc v1.0.0 h1:cXCdzVdstXyiTqTvfqk9SDHpKNjxuom+DOlyEeQ4pzQ=
 github.com/MakeNowJust/heredoc v1.0.0/go.mod h1:mG5amYoWBHf8vpLOuehzbGGw0EHxpZZ6lCpQ4fNJ8LE=
-github.com/alecthomas/assert/v2 v2.10.0 h1:jjRCHsj6hBJhkmhznrCzoNpbA3zqy0fYiUcYZP/GkPY=
-github.com/alecthomas/assert/v2 v2.10.0/go.mod h1:Bze95FyfUr7x34QZrjL+XP+0qgp/zg8yS+TtBj1WA3k=
+github.com/alecthomas/assert/v2 v2.11.0 h1:2Q9r3ki8+JYXvGsDyBXwH3LcJ+WK5D0gc5E8vS6K3D0=
+github.com/alecthomas/assert/v2 v2.11.0/go.mod h1:Bze95FyfUr7x34QZrjL+XP+0qgp/zg8yS+TtBj1WA3k=
 github.com/alecthomas/chroma/v2 v2.14.0 h1:R3+wzpnUArGcQz7fCETQBzO5n9IMNi13iIs46aU4V9E=
 github.com/alecthomas/chroma/v2 v2.14.0/go.mod h1:QolEbTfmUHIMVpBqxeDnNBj2uoeI4EbYP4i6n68SG4I=
-github.com/alecthomas/kong v1.2.1 h1:E8jH4Tsgv6wCRX2nGrdPyHDUCSG83WH2qE4XLACD33Q=
-github.com/alecthomas/kong v1.2.1/go.mod h1:rKTSFhbdp3Ryefn8x5MOEprnRFQ7nlmMC01GKhehhBM=
+github.com/alecthomas/kong v1.4.0 h1:UL7tzGMnnY0YRMMvJyITIRX1EpO6RbBRZDNcCevy3HA=
+github.com/alecthomas/kong v1.4.0/go.mod h1:p2vqieVMeTAnaC83txKtXe8FLke2X07aruPWXyMPQrU=
 github.com/alecthomas/mango-kong v0.1.0 h1:iFVfP1k1K4qpml3JUQmD5I8MCQYfIvsD9mRdrw7jJC4=
 github.com/alecthomas/mango-kong v0.1.0/go.mod h1:t+TYVdsONUolf/BwVcm+15eqcdAj15h4Qe9MMFAwwT4=
 github.com/alecthomas/repr v0.4.0 h1:GhI2A8MACjfegCPVq9f1FLvIBS+DrQ2KQBFZP1iFzXc=