Documentation Improvements (#46)

# Documentation Improvements

## ⚙️ Release Notes 
- Adds additional documentation about GCP service accounts and Firebase
permissions.


### Code of Conduct & Contributing Guidelines 

By submitting creating this pull request, you agree to follow our [Code
of
Conduct](https://github.com/StanfordBDHG/.github/blob/main/CODE_OF_CONDUCT.md)
and [Contributing
Guidelines](https://github.com/StanfordBDHG/.github/blob/main/CONTRIBUTING.md):
- [x] I agree to follow the [Code of
Conduct](https://github.com/StanfordBDHG/.github/blob/main/CODE_OF_CONDUCT.md)
and [Contributing
Guidelines](https://github.com/StanfordBDHG/.github/blob/main/CONTRIBUTING.md).

---------

Signed-off-by: Paul Schmiedmayer <[email protected]>

.github/workflows/firebase-deploy.yml

@@ -23,7 +23,7 @@ on:
         default: ''
     secrets:
       GOOGLE_APPLICATION_CREDENTIALS_BASE64:
-        description: 'The Base64 version of the private key JSON file for the service account. You can lean more about how to generate the JSON at https://firebase.google.com/docs/app-distribution/authenticate-service-account. The service account must have the minimally required permissions as documented at https://firebase.google.com/docs/projects/iam/roles-predefined.'
+        description: 'The Base64 version of the private key JSON file for the service account. You can lean more about how to generate the JSON at https://cloud.google.com/iam/docs/service-accounts-create. The service account must have the minimally required permissions documented at https://firebase.google.com/docs/projects/iam/permissions.'
         required: true
 
 jobs: