fix(airtable): rename columns that contain colons

[lauriemerrell]

Overall Description

Manually rename two Airtable columns that were causing the Airtable operator to fail.

Led to creation of:

• Airtable: Refactor operator to write to GCS first and then load to BigQuery #1217
• calitp-py#41

However since there was this lower-impact fix, I figured I'd just do this to unblock the DAG and we can prioritize the bigger-picture things longer term.

Checklist for all PRs

• Run pre-commit run --all-files to make sure markdown/lint passes
• Link this pull request to all issues that it will close using keywords (see GitHub docs about Linking a pull request to an issue using a keyword). Also mention any issues that are partially addressed or are related.

Airflow DAG changes checklist

• Include this section whenever any change to a DAG in the airflow/dags folder occurs, otherwise please omit this section.

• Verify that all affected DAG tasks were able to run in a local environment

• Take a screenshot of the graph view of the affected DAG in the local environment showing that all affected DAG tasks completed successfully
  

• Add/update documentation in the docs/airflow folder as needed

• Fill out the following section describing what DAG tasks were added/updated

This PR updates the airtable_loader DAG in order to updates the following DAG tasks:

• california_transit_services: Add manual name overrides to handle column names containing colons

[atvaccaro]

I feel like to_snakecase should replace any non-alphanumerics instead of this hard-coded list...