Fix Avalanche Problems in Observations Schema

[kevinherdez]

A Zod Error came in that uncovered an issue with the observation -> advanced_fields -> avalanche_problems -> type schema where if the type didn't match the specific AvalancheProblems enum, then we failed to parse.

The problem was that one of the avalanche problems had a type of 'Cornice' instead of 'Cornice Fall'

Obs that had the issue:
https://nwac.us/observations/#/view/observations/9801b523-356b-440c-9f30-1fe0607ce9fa

Zod Error:

ZodError: [
  {
    "code": "too_big",
    "maximum": 0,
    "type": "string",
    "inclusive": true,
    "exact": true,
    "message": "String must contain exactly 0 character(s)",
    "path": [
      "advanced_fields",
      "avalanche_problems",
      2,

[kevinherdez]

I actually need to see if this is the proper fix. CorniceFall might need to be changed to Cornice in AvalancheProblemName. I want to make sure that that won't mess anything up with the avalanche forecast problems though