Bump github.com/buildpacks/libcnb from 1.30.3 to 1.30.4

Bumps [github.com/buildpacks/libcnb](https://github.com/buildpacks/libcnb) from 1.30.3 to 1.30.4.
- [Release notes](https://github.com/buildpacks/libcnb/releases)
- [Commits](buildpacks/libcnb@v1.30.3...v1.30.4)

---
updated-dependencies:
- dependency-name: github.com/buildpacks/libcnb
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

go.mod

@@ -3,7 +3,7 @@ module github.com/buildpacks/github-actions
 go 1.23
 
 require (
-	github.com/buildpacks/libcnb v1.30.3
+	github.com/buildpacks/libcnb v1.30.4
 	github.com/google/go-containerregistry v0.20.2
 	github.com/google/go-github/v39 v39.2.0
 	github.com/onsi/gomega v1.34.2

go.sum

@@ -2,8 +2,8 @@ github.com/BurntSushi/toml v1.4.0 h1:kuoIxZQy2WRRk1pttg9asf+WVv6tWQuBNVmK8+nqPr0
 github.com/BurntSushi/toml v1.4.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
 github.com/Masterminds/semver/v3 v3.3.0 h1:B8LGeaivUe71a5qox1ICM/JLl0NqZSW5CHyL+hmvYS0=
 github.com/Masterminds/semver/v3 v3.3.0/go.mod h1:4V+yj/TJE1HU9XfppCwVMZq3I84lprf4nC11bSS5beM=
-github.com/buildpacks/libcnb v1.30.3 h1:JtFMFPO2450uDLzpE1b50TvmM1GEZa8YT9cQ2ZZtHqA=
-github.com/buildpacks/libcnb v1.30.3/go.mod h1:JPb1vC7HQcGK0oONfqJvsYzOjw3be+WBbQ0KYOIhNvA=
+github.com/buildpacks/libcnb v1.30.4 h1:Jp6cJxYsZQgqix+lpRdSpjHt5bv5yCJqgkw9zWmS6xU=
+github.com/buildpacks/libcnb v1.30.4/go.mod h1:vjEDAlK3/Rf67AcmBzphXoqIlbdFgBNUK5d8wjreJbY=
 github.com/containerd/stargz-snapshotter/estargz v0.15.1 h1:eXJjw9RbkLFgioVaTG+G/ZW/0kEe2oEKCdS/ZxIyoCU=
 github.com/containerd/stargz-snapshotter/estargz v0.15.1/go.mod h1:gr2RNwukQ/S9Nv33Lt6UC7xEx58C+LHRdoqbEKjz1Kk=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=