tests: use the latest tag to run helia interop

All PRs have been merged:
- ipfs/helia#200
- ipfs/helia-unixfs#68
- ipfs/helia-ipns#72

.github/workflows/build.yml

@@ -80,10 +80,6 @@ jobs:
           path: interop
       - name: Checkout latest tag
         run: |
-          exit 0 # temporary while theses pull requests are released:
-          # https://github.com/ipfs/helia/pull/200
-          # https://github.com/ipfs/helia-unixfs/pull/68
-          # https://github.com/ipfs/helia-ipns/pull/72
           export TAG="$(git describe --tags --abbrev=0)"
           echo "Running tests against: $TAG"
           git checkout "$TAG"