Add some words to dictionary

[sjspielman]

Closes #719

This PR adds some of the found typos to the dictionary. Some choices I made:

• I added...
  • "podman" since that is the container software used in the wilms module, but I could alternatively remove it and we could later update it to be podman in the module if preferred.
  • unhide." If that's the word R Markdown uses, I guess that's the word!
• I didn't add...
  • Gene names or words that appear in DOIs (e.g. "oncotarget") since we expect to add those in backticks eventually
  • The cell type "Treg". Should I, or will we eventually want things like that in backticks?

Let me know if you think I missed anything! Here are the typos from #719: spell_check_errors.tsv.txt

[jashapiro]

I would probably go ahead and add gene names, since the standard formatting for those is italics in text, and I expect that to be used most of the time.

I would also add "snRNA" (and "scRNA while we are at it?)

[sjspielman]

I would also add "snRNA"

Ugh I did, but didn't push... thanks