Add a line to indicate when the schools.csv was last updated (#237)

Co-authored-by: Jonathan Gottfried <[email protected]>

.github/workflows/schools_updater.yml

@@ -70,7 +70,11 @@ jobs:
       - name: Filter JSON to only include school names and save as school.csv
         run: |
           # Add first line to CSV file
-          echo "\"Below is a list of all schools that we've manually verified. If you see one that hasn't been included, please add it via my.mlh.io and we'll verify it soon.\"" > schools.csv
+          CURRENT_TIMESTAMP=$(date +"%Y-%m-%d %H:%M:%S")
+          echo "\"Below is a list of all schools that we've manually verified. If you see one that hasn't been included, please add it via my.mlh.io and we'll verify it soon. List last updated at: $CURRENT_TIMESTAMP.\"" > schools.csv
+
+          # Extract only the "name" field from each entry and overwrite data.json
+          jq -r '.[].name' data.json >> schools.csv
 
           # Wrap each "name" in an array to use @csv for correct CSV formatting
           jq -r '.[].name | [.] | @csv' data.json >> schools.csv