trying to update readme so portfolio will run

Author: amandaha8

gtfs_digest/README_pipeline.md renamed to gtfs_digest/README.md

@@ -0,0 +1,6 @@
+# GTFS Digest
+
+This portfolio houses performance metrics from GTFS schedule and vehicle positions time-series data for all transit operators by route.
+To read about the methodology, please visit [here](https://github.com/cal-itp/data-analyses/blob/main/gtfs_digest/methodology.md). 
+
+To download our processed full data that powers this portfolio, please navigate to the folder titled `gtfs_digest` [here](https://console.cloud.google.com/storage/browser/calitp-publish-data-analysis). You will find the most recent datasets in a `.parquet` format. The data pulled from the Federal Transit Administration's National Transit Data is located [here](https://www.transit.dot.gov/ntd/data-product/2022-annual-database-agency-information). 

portfolio/gtfs_digest/README.md

@@ -125,5 +125,5 @@ parts:
       district: 12 - Irvine
     sections:
     - organization_name: Orange County Transportation Authority
-readme: ./gtfs_digest/README_pipeline.md
+readme: ./gtfs_digest/README.md
 title: GTFS Digest