Update README with instructions for making edits to the handbook

Author: phillybroadbent

README.md

@@ -1 +1,15 @@
-# SSI Handbook
+# SSI Handbook
+Please note that this document is a work in progress.
+
+## Editing the SSI Handbook
+
+To make changes to the SSI Handbook, follow these steps:
+
+1. Navigate to the `ssi-handbook` folder.
+2. Open the specific section you want to edit, such as `organisational_chart.md`.
+3. Click the pencil icon in the upper-right corner (hovering over it will display "Edit this file").
+4. Modify the content as needed, ensuring you use proper Markdown formatting. For a Markdown guide, refer to [Markdown Guide](https://www.markdownguide.org/).
+5. Click on **Commit changes**.
+6. Enter a brief commit message summarizing your update, such as "Update organizational chart with new staff member." If needed, provide additional details in the 'Extended description' box.
+7. Verify that the option **Commit directly to the main branch** is selected.
+8. Click **Commit changes**. Your updates will appear in the handbook within a few minutes.