The job often fails temporarily, which can be confusing to contributors. By moving it to a separate 'Check Links' workflow, it hopefully becomes clearer that the failure is unrelated to a PR.
The misspell tool that we used previously has no exclude switch for ignoring translated files. Also, it looks like it is not maintained anymore.
In addition to changing our spell checker, this commit renames the `Build Site` workflow to `Blog` (to be consistent with our `Code` workflow).
