chore(deps): bump gittuf/gittuf-installer from 0.4.0 to 0.5.0

Bumps [gittuf/gittuf-installer](https://github.com/gittuf/gittuf-installer) from 0.4.0 to 0.5.0.
- [Release notes](https://github.com/gittuf/gittuf-installer/releases)
- [Commits](gittuf/gittuf-installer@fe64479...2623545)

---
updated-dependencies:
- dependency-name: gittuf/gittuf-installer
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/verify.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Install gittuf
-        uses: gittuf/gittuf-installer@fe644793aaaa419fef63800d5cf318663aa93105
+        uses: gittuf/gittuf-installer@26235450ee63a0bb9d834ecd62b910783af72006
       - name: Checkout and verify repository
         run: |
           gittuf clone https://github.com/${{ github.repository }}