chore(ci): add issues write perms to build_preview_sites.yml

[pront]

Summary

https://github.com/vectordotdev/vector/actions/runs/11938767613

The workflow is not valid. .github/workflows/build_preview_sites.yml (Line: 10, Col: 3): Error calling workflow 'vectordotdev/vector/.github/workflows/create_preview_sites.yml@6cf6df5af282514cd48b534e027faf2c5c69b0fe'. The workflow is requesting 'issues: write', but is only allowed 'issues: none'.

Change Type

• [x] Bug fix
• [ ] New feature
• [ ] Non-functional (chore, refactoring, docs)
• [ ] Performance

Is this a breaking change?

• [ ] Yes
• [x] No

How did you test this PR?

Does this PR include user facing changes?

• [x] Yes. Please add a changelog fragment based on our guidelines.
• [x] No. A maintainer will apply the "no-changelog" label to this PR.

Checklist

• [x] Please read our Vector contributor resources.
• [ ] If this PR introduces changes Vector dependencies (modifies Cargo.lock), please run dd-rust-license-tool write to regenerate the license inventory and commit the changes (if any). More details here.

References