fix: add file that CI is trying to create via a commit

[sstadick]

When the new target was added it triggered the creation of a new failed-compatibility-* file via CI.

CI tries to diff the failed-compat files and commit any new failures. We've never had something fail the compat check, so nothing has ever tried to add to those files. CI tries commit the changes, but the repo permissions disallow commits directly to main. Example failed job: https://github.com/modular/modular-community/actions/runs/21632682673/job/62349367247 (cc @bgreni this is why your build failed).

I think just adding this file will let things continue, but a better fix should be figured out. Either changing the repo permissions to let CI work, or finding some other way to deal with the compat check.

Jobs that have failed in this way:

• https://github.com/modular/modular-community/actions/runs/21588983360/job/62204061140 (mojo-toml)
• https://github.com/modular/modular-community/actions/runs/21607495894/job/62281903226 (mojmelo)
• https://github.com/modular/modular-community/actions/runs/21612198286/job/62283250579 (mojo-dotenv)
• https://github.com/modular/modular-community/actions/runs/21632682673/job/62349367247 (emberjson)

[Ahajha]

Thanks, this seems like a reasonable stopgap