Document walkthrough of running pipeline with different config

[athowes]

Based on Teams chat with @zsusswein.

Following merge of #131 then the pipeline will be easier to run based on current main branch as the pool will already be set-up.

This means that it should be possible for someone e.g. me to run the pipeline relatively easily.

It would be an instructive task to try doing this, including say with a different configuation file for different parameter estimates from cfa-parameter-estimates:

1. Make an update to prod.parquet parameter estimates
2. Use https://github.com/CDCgov/cfa-config-generator to generate config (button is in actions tab to generate configs)
3. Try running pipeline pointing at new config

As with previous issues, I think tasks like this should be documented in package vignettes, so would suggest trying to do this and putting as package vignette to close.

(This issue is possibly duplicate of others.)

[zsusswein]

See #116 as possible dupe?