Update renv settings to ignore package self

[NeuroShepherd]

No description provided.

[NeuroShepherd]

I was suddenly no longer able to deploy the app to rsconnect (from any branch or with changes to the GitHub Action). This PR address this issue.

Diagnosis:

Deployment was failing at the renv::deployApp() stage of my action with an error from the rsconnect:::parseRenvDependencies(). The information from the GH runner wasn't sufficient so I ran this internal function locally, and it also produced an error because the lock file was out of sync with the library. The only "out of sync" component is the package actually being developed in this repository. (IMO this function should just return a warning.)

Solution:

Manually add the package to the renv ignored packages with renv::settings$ignored.packages("ordinalsimr"), snapshot everything again, and push the changes to GitHub.