update README

README.md

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 Scripts and example files 
 
 - Data preparation for Kaggle [Ribonanza competition 2023](https://www.kaggle.com/competitions/stanford-ribonanza-rna-folding/overview), launched on Sep. 7, 2023.
-- **Keep confidential until December 2023**. This repo will be publicly released after competition end in December 2023  
 - Initial repo involves preparation of train_data, test_data (public leaderboard), and small fraction of private leaderboard available at competition start.
-- When Positives240, Positives390, and OneMil-Round2 ('future data') are collected during competition, make sure to **update this repo** to document data prep.
+- When Positives240 and OneMil-Round2 ('future data') were collected during competition, the Google Drive linked below was updated to create new solution files.
 
 Initial repo prepared on Sep. 10, 2023.
 Release date: Feb. 20, 2024
@@ -16,6 +15,8 @@ Release date: Feb. 20, 2024
 The complete **kaggle2023** folder is on Rhiju Das's laptop, which is synced to [this Google Drive (made public at competition end)](https://drive.google.com/open?id=15dTkZoVHioacjgcGfwsYBF7xyt4qYOVc&usp=drive_fs)
 as well as on Stanford's Oak long-term storage (`/oak/stanford/groups/rhiju/sherlock/scratch/rhiju/Experiments/Eterna_RYOP_Pilot2022_experiments/DataAnalysis/kaggle2023.tgz`)
 
+Notes on 'releases' of data & solution sets are available in this [RibonanzaKaggle2023_VersionNotes Sheet](https://docs.google.com/spreadsheets/d/1lxkhN-nmqxMru2CKYi9pzZZ7uT5IT6k47zTGvdKkrvo/edit?usp=drive_link) which is in the Google Drive above.
+
 ## What's in here
 
 * `matlab` - scripts that need to be added to your MATLAB path to run the scripts