build(deps): bump theupdateframework/tuf-conformance (#2711)

Bumps the action-dependencies group with 1 update: [theupdateframework/tuf-conformance](https://github.com/theupdateframework/tuf-conformance).


Updates `theupdateframework/tuf-conformance` from 1.1.0 to 2.0.0
- [Release notes](https://github.com/theupdateframework/tuf-conformance/releases)
- [Commits](theupdateframework/tuf-conformance@d8ab40b...f4acd16)

---
updated-dependencies:
- dependency-name: theupdateframework/tuf-conformance
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: action-dependencies
...

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

.github/workflows/conformance.yml

@@ -17,6 +17,6 @@ jobs:
         uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0
 
       - name: Run test suite
-        uses: theupdateframework/tuf-conformance@d8ab40ba95e4a62db7170376b6ccaa0e0001dcc6 # v1.1.0
+        uses: theupdateframework/tuf-conformance@f4acd16d0ea49a6fd5cc4558084b578c6fc7d6cd # v2.0.0
         with:
           entrypoint: ".github/scripts/conformance-client.py"