Restore non-self-runner

Author: pcj

.github/workflows/release_ruleset.yaml

@@ -121,7 +121,7 @@ jobs:
     permissions:
       id-token: write
       attestations: write
-    runs-on: self-hosted
+    runs-on: ubuntu-latest
     steps:
       # actions/download-artifact@v4 does not yet support downloading via the immutable artifact-id,
       # but the Javascript library does. See: https://github.com/actions/download-artifact/issues/349
@@ -172,7 +172,7 @@ jobs:
     needs: [build, attest]
     permissions:
       contents: write
-    runs-on: self-hosted
+    runs-on: ubuntu-latest
     steps:
       # actions/download-artifact@v4 does not yet support downloading via the immutable artifact-id,
       # but the Javascript library does. See: https://github.com/actions/download-artifact/issues/349