Update README.md

Author: kozo2

README.md

@@ -1,8 +1,13 @@
 # id2id
 
-## Zenodo
+## How to update and save id2id table in cloud storage (GitHub Releases and Zenodo)
 
-TO BE FILLED.
+1. Clone this repo.
+2. Update the datasets in this repo (and commit it).
+3. Create a Git tag (for this repo).
+4. Push 2. and 3. here (== github.com/ecell/id2id).
+
+Doing the above will automatically create an id2id table (TSV) with GitHub Actions and save it to GitHub Releases (https://github.com/ecell/id2id/releases) and Zenodo(https://zenodo.org/record/7562297).
 
 ## id2id table column definitions
 
@@ -12,4 +17,4 @@ TO BE FILLED.
 
 ## How to reproduce id2id table
 
-See https://github.com/ecell/id2id/blob/main/.github/workflows/createid2id.yml
+Follow the workflow described in https://github.com/ecell/id2id/blob/main/.github/workflows/createid2id.yml