Bump github.com/paketo-buildpacks/libpak from 1.67.2 to 1.68.0

Bumps [github.com/paketo-buildpacks/libpak](https://github.com/paketo-buildpacks/libpak) from 1.67.2 to 1.68.0.
- [Release notes](https://github.com/paketo-buildpacks/libpak/releases)
- [Commits](paketo-buildpacks/libpak@v1.67.2...v1.68.0)

---
updated-dependencies:
- dependency-name: github.com/paketo-buildpacks/libpak
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/heroku/color v0.0.6
 	github.com/mattn/go-shellwords v1.0.12
 	github.com/onsi/gomega v1.30.0
-	github.com/paketo-buildpacks/libpak v1.67.2
+	github.com/paketo-buildpacks/libpak v1.68.0
 	github.com/paketo-buildpacks/source-removal v0.2.1
 	github.com/sclevine/spec v1.4.0
 	github.com/stretchr/testify v1.8.4

go.sum

@@ -43,8 +43,8 @@ github.com/mitchellh/hashstructure/v2 v2.0.2/go.mod h1:MG3aRVU/N29oo/V/IhBX8GR/z
 github.com/onsi/ginkgo/v2 v2.13.0 h1:0jY9lJquiL8fcf3M4LAXN5aMlS/b2BV86HFFPCPMgE4=
 github.com/onsi/gomega v1.30.0 h1:hvMK7xYz4D3HapigLTeGdId/NcfQx1VHMJc60ew99+8=
 github.com/onsi/gomega v1.30.0/go.mod h1:9sxs+SwGrKI0+PWe4Fxa9tFQQBG5xSsSbMXOI8PPpoQ=
-github.com/paketo-buildpacks/libpak v1.67.2 h1:GJSpDsVXpszhLbyOYHVqyaEJxz2REC4wS10V6W4Spxk=
-github.com/paketo-buildpacks/libpak v1.67.2/go.mod h1:6Gy476XxNUOIPo33EB2GI/fvutM9SRCJ7hcP2baLu1g=
+github.com/paketo-buildpacks/libpak v1.68.0 h1:unfJscVujFT8WZgUONMh4vp64x+LvAz6kwpPdagYibM=
+github.com/paketo-buildpacks/libpak v1.68.0/go.mod h1:Np94HbeUNYcMmaJEnaP5VgqGgaz86RhWA9nONRCN96U=
 github.com/paketo-buildpacks/source-removal v0.2.1 h1:mDqageTOHN3kBZVKFxwamsnEH4vvWf0U5MDgBLVSAxw=
 github.com/paketo-buildpacks/source-removal v0.2.1/go.mod h1:VZ3efagWIBSwJXrRWZ+nXxNLVnEj9cAAfwOoksG2w0M=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=