build(deps): Bump github.com/google/rpmpack from 0.5.0 to 0.6.0

Bumps [github.com/google/rpmpack](https://github.com/google/rpmpack) from 0.5.0 to 0.6.0.
- [Release notes](https://github.com/google/rpmpack/releases)
- [Commits](google/rpmpack@v0.5...v0.6.0)

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

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

go.mod

@@ -15,7 +15,7 @@ require (
 	github.com/go-openapi/swag v0.22.9
 	github.com/go-openapi/validate v0.23.0
 	github.com/google/go-cmp v0.6.0
-	github.com/google/rpmpack v0.5.0
+	github.com/google/rpmpack v0.6.0
 	github.com/google/trillian v1.6.0
 	github.com/in-toto/in-toto-golang v0.9.0
 	github.com/jedisct1/go-minisign v0.0.0-20211028175153-1c139d1cc84b

go.sum

@@ -227,8 +227,8 @@ github.com/google/martian/v3 v3.3.2 h1:IqNFLAmvJOgVlpdEBiQbDc2EwKW77amAycfTuWKdf
 github.com/google/martian/v3 v3.3.2/go.mod h1:oBOf6HBosgwRXnUGWUB05QECsc6uvmMiJ3+6W4l/CUk=
 github.com/google/pprof v0.0.0-20231023181126-ff6d637d2a7b h1:RMpPgZTSApbPf7xaVel+QkoGPRLFLrwFO89uDUHEGf0=
 github.com/google/pprof v0.0.0-20231023181126-ff6d637d2a7b/go.mod h1:czg5+yv1E0ZGTi6S6vVK1mke0fV+FaUhNGcd6VRS9Ik=
-github.com/google/rpmpack v0.5.0 h1:L16KZ3QvkFGpYhmp23iQip+mx1X39foEsqszjMNBm8A=
-github.com/google/rpmpack v0.5.0/go.mod h1:uqVAUVQLq8UY2hCDfmJ/+rtO3aw7qyhc90rCVEabEfI=
+github.com/google/rpmpack v0.6.0 h1:LoQuqlw6kHRwg25n3M0xtYrW+z2pTkR0ae1xx11hRw8=
+github.com/google/rpmpack v0.6.0/go.mod h1:uqVAUVQLq8UY2hCDfmJ/+rtO3aw7qyhc90rCVEabEfI=
 github.com/google/s2a-go v0.1.7 h1:60BLSyTrOV4/haCDW4zb1guZItoSq8foHCXrAnjBo/o=
 github.com/google/s2a-go v0.1.7/go.mod h1:50CgR4k1jNlWBu4UfS4AcfhVe1r6pdZPygJ3R8F0Qdw=
 github.com/google/subcommands v1.0.1/go.mod h1:ZjhPrFU+Olkh9WazFPsl27BQ4UPiG37m3yTrtFlrHVk=